diff --git a/src/main/java/com/booleanuk/core/Article.java b/src/main/java/com/booleanuk/core/Article.java
index 1e359b0..0b6c9f3 100644
--- a/src/main/java/com/booleanuk/core/Article.java
+++ b/src/main/java/com/booleanuk/core/Article.java
@@ -1,35 +1,9 @@
 package com.booleanuk.core;
 
-public class Article {
-    String title;
-
-    boolean onLoan = false;
-
-    public Article(String title) {
-        this.title = title;
-    }
-
-    public boolean isOnLoan() {
-        return onLoan;
-    }
-
-    public String checkIn() {
-        if (!this.isOnLoan()) {
-            return "item is not currently on loan";
-        }
-
-        this.onLoan = false;
-
-        return "item has been checked in";
-    }
-
-    public String checkOut() {
-        if (this.isOnLoan()) {
-            return "item is currently on loan";
-        }
-
-        this.onLoan = true;
-
-        return "item has been checked out";
+public class Article extends Item{
+    Author author;
+    public Article(String title, Author author) {
+        super(title);
+        this.author = author;
     }
 }
diff --git a/src/main/java/com/booleanuk/core/Author.java b/src/main/java/com/booleanuk/core/Author.java
new file mode 100644
index 0000000..cb95b28
--- /dev/null
+++ b/src/main/java/com/booleanuk/core/Author.java
@@ -0,0 +1,33 @@
+package com.booleanuk.core;
+
+public class Author {
+    private String name;
+    private String contact;
+    private String website;
+
+    public Author(String name, String contact, String website){
+        this.name = name;
+        this.contact = contact;
+        this.website = website;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getContact() {
+        return contact;
+    }
+
+    public void setContact(String contact) {
+        this.contact = contact;
+    }
+
+    public String getWebsite() {
+        return website;
+    }
+
+    public void setWebsite(String website) {
+        this.website = website;
+    }
+}
diff --git a/src/main/java/com/booleanuk/core/Book.java b/src/main/java/com/booleanuk/core/Book.java
index 9261f65..b31b3b3 100644
--- a/src/main/java/com/booleanuk/core/Book.java
+++ b/src/main/java/com/booleanuk/core/Book.java
@@ -1,35 +1,9 @@
 package com.booleanuk.core;
 
-public class Book {
-    String title;
-
-    boolean onLoan = false;
-
-    public Book(String title) {
-        this.title = title;
-    }
-
-    public boolean isOnLoan() {
-        return onLoan;
-    }
-
-    public String checkIn() {
-        if (!this.isOnLoan()) {
-            return "item is not currently on loan";
-        }
-
-        this.onLoan = false;
-
-        return "item has been checked in";
-    }
-
-    public String checkOut() {
-        if (this.isOnLoan()) {
-            return "item is currently on loan";
-        }
-
-        this.onLoan = true;
-
-        return "item has been checked out";
+public class Book extends Item{
+    Author author;
+    public Book(String title, Author author) {
+        super(title);
+        this.author = author;
     }
 }
diff --git a/src/main/java/com/booleanuk/core/Item.java b/src/main/java/com/booleanuk/core/Item.java
new file mode 100644
index 0000000..dbde9a3
--- /dev/null
+++ b/src/main/java/com/booleanuk/core/Item.java
@@ -0,0 +1,34 @@
+package com.booleanuk.core;
+
+abstract public class Item {
+    protected String title;
+    protected boolean onLoan = false;
+
+    public Item(String title){
+        this.title = title;
+    }
+
+    public boolean isOnLoan() {
+        return onLoan;
+    }
+
+    public String checkIn() {
+        if (!this.isOnLoan()) {
+            return "item is not currently on loan";
+        }
+
+        this.onLoan = false;
+
+        return "item has been checked in";
+    }
+
+    public String checkOut() {
+        if (this.isOnLoan()) {
+            return "item is currently on loan";
+        }
+
+        this.onLoan = true;
+
+        return "item has been checked out";
+    }
+}
diff --git a/src/main/java/com/booleanuk/core/Library.java b/src/main/java/com/booleanuk/core/Library.java
index f03ecf0..ecf8459 100644
--- a/src/main/java/com/booleanuk/core/Library.java
+++ b/src/main/java/com/booleanuk/core/Library.java
@@ -1,92 +1,40 @@
 package com.booleanuk.core;
 
+import java.util.ArrayList;
 import java.util.List;
 
 public class Library {
-    List<Article> articles;
-    List<Book> books;
-    List<Newspaper> newspapers;
+    List<Item> items;
 
-    public void addToStock(Article item) {
-        this.articles.add(item);
+    public Library(){
+        items = new ArrayList<>();
     }
 
-    public void addToStock(Book item) {
-        this.books.add(item);
-    }
-
-    public void addToStock(Newspaper item) {
-        this.newspapers.add(item);
+    public void addToStock(Item item) {
+        this.items.add(item);
     }
 
     // The following methods may contain code that you are unfamiliar with. The strange syntax of article -> something
     // is called a lambda expression (https://www.w3schools.com/java/java_lambda.asp)
-    public String checkInArticle(String title) {
-        List<Article> filtered = this.articles.stream()
-                .filter(article -> article.title.equals(title))
-                .toList();
-
-        if (filtered.size() < 1) {
-            return "item is not part of the library's collection";
-        }
-
-        return filtered.get(0).checkIn();
-    }
-
-    public String checkOutArticle(String title) {
-        List<Article> filtered = this.articles.stream()
-                .filter(article -> article.title.equals(title))
-                .toList();
-
-        if (filtered.size() < 1) {
-            return "item is not part of the library's collection";
-        }
-
-        return filtered.get(0).checkOut();
-    }
-
-    public String checkInBook(String title) {
-        List<Book> filtered = this.books.stream()
-                .filter(book -> book.title.equals(title))
-                .toList();
-
-        if (filtered.size() < 1) {
-            return "item is not part of the library's collection";
-        }
-
-        return filtered.get(0).checkIn();
-    }
-
-    public String checkOutBook(String title) {
-        List<Book> filtered = this.books.stream()
-                .filter(book -> book.title.equals(title))
-                .toList();
-
-        if (filtered.size() < 1) {
-            return "item is not part of the library's collection";
-        }
-
-        return filtered.get(0).checkOut();
-    }
 
-    public String checkInNewspaper(String title) {
-        List<Newspaper> filtered = this.newspapers.stream()
-                .filter(newspaper -> newspaper.title.equals(title))
+    public String checkInItem(String title) {
+        List<Item> filtered = items.stream()
+                .filter(item -> item.title.equals(title))
                 .toList();
 
-        if (filtered.size() < 1) {
+        if (filtered.isEmpty()) {
             return "item is not part of the library's collection";
         }
 
         return filtered.get(0).checkIn();
     }
 
-    public String checkOutNewspaper(String title) {
-        List<Newspaper> filtered = this.newspapers.stream()
-                .filter(newspaper -> newspaper.title.equals(title))
+    public String checkOutItem(String title) {
+        List<Item> filtered = this.items.stream()
+                .filter(item -> item.title.equals(title))
                 .toList();
 
-        if (filtered.size() < 1) {
+        if (filtered.isEmpty()) {
             return "item is not part of the library's collection";
         }
 
diff --git a/src/main/java/com/booleanuk/core/Newspaper.java b/src/main/java/com/booleanuk/core/Newspaper.java
index 8411d9c..758cd0f 100644
--- a/src/main/java/com/booleanuk/core/Newspaper.java
+++ b/src/main/java/com/booleanuk/core/Newspaper.java
@@ -1,22 +1,16 @@
 package com.booleanuk.core;
 
-public class Newspaper {
-    String title;
-
-    boolean onLoan = false;
-
+public class Newspaper extends Item{
     public Newspaper(String title) {
-        this.title = title;
-    }
-
-    public boolean isOnLoan() {
-        return onLoan;
+        super(title);
     }
 
+    @Override
     public String checkIn() {
         return "newspapers are not available for loan";
     }
 
+    @Override
     public String checkOut() {
         return "newspapers are not available for loan";
     }
diff --git a/src/test/java/com/booleanuk/core/ArticleTest.java b/src/test/java/com/booleanuk/core/ArticleTest.java
index 00bbaeb..871c3a4 100644
--- a/src/test/java/com/booleanuk/core/ArticleTest.java
+++ b/src/test/java/com/booleanuk/core/ArticleTest.java
@@ -4,15 +4,16 @@
 import org.junit.jupiter.api.Test;
 
 class ArticleTest {
+    Author a = new Author("", "", "");
     @Test
     public void shouldCheckOutIfAvailable() {
-        Article article = new Article("JUnit Rocks");
+        Article article = new Article("JUnit Rocks", a);
         Assertions.assertEquals("item has been checked out", article.checkOut());
     }
 
     @Test
     public void shouldDeclineIfNotAvailableToCheckout() {
-        Article article = new Article("JUnit Rocks");
+        Article article = new Article("JUnit Rocks", a);
         article.checkOut();
 
         Assertions.assertEquals("item is currently on loan", article.checkOut());
@@ -20,7 +21,7 @@ public void shouldDeclineIfNotAvailableToCheckout() {
 
     @Test
     public void shouldCheckInIfOnLoan() {
-        Article article = new Article("JUnit Rocks");
+        Article article = new Article("JUnit Rocks", a);
         article.checkOut();
 
         Assertions.assertEquals("item has been checked in", article.checkIn());
@@ -28,8 +29,19 @@ public void shouldCheckInIfOnLoan() {
 
     @Test
     public void shouldDeclineCheckInIfNotOnLoan() {
-        Article article = new Article("JUnit Rocks");
+        Article article = new Article("JUnit Rocks", a);
 
         Assertions.assertEquals("item is not currently on loan", article.checkIn());
     }
+
+    @Test
+    public void testAuthor(){
+        Article article = new Article("JUnit Rocks", a);
+
+        Assertions.assertEquals("", a.getContact());
+
+        a.setContact("911");
+
+        Assertions.assertEquals("911", a.getContact());
+    }
 }
diff --git a/src/test/java/com/booleanuk/core/BookTest.java b/src/test/java/com/booleanuk/core/BookTest.java
index 180a165..fad01d4 100644
--- a/src/test/java/com/booleanuk/core/BookTest.java
+++ b/src/test/java/com/booleanuk/core/BookTest.java
@@ -4,15 +4,17 @@
 import org.junit.jupiter.api.Test;
 
 public class BookTest {
+    Author a = new Author("","","");
+
     @Test
     public void shouldCheckOutIfAvailable() {
-        Book book = new Book("JUnit Rocks");
+        Book book = new Book("JUnit Rocks", a);
         Assertions.assertEquals("item has been checked out", book.checkOut());
     }
 
     @Test
     public void shouldDeclineIfNotAvailableToCheckout() {
-        Book book = new Book("JUnit Rocks");
+        Book book = new Book("JUnit Rocks", a);
         book.checkOut();
 
         Assertions.assertEquals("item is currently on loan", book.checkOut());
@@ -20,7 +22,7 @@ public void shouldDeclineIfNotAvailableToCheckout() {
 
     @Test
     public void shouldCheckInIfOnLoan() {
-        Book book = new Book("JUnit Rocks");
+        Book book = new Book("JUnit Rocks", a);
         book.checkOut();
 
         Assertions.assertEquals("item has been checked in", book.checkIn());
@@ -28,8 +30,19 @@ public void shouldCheckInIfOnLoan() {
 
     @Test
     public void shouldDeclineCheckInIfNotOnLoan() {
-        Book book = new Book("JUnit Rocks");
+        Book book = new Book("JUnit Rocks", a);
 
         Assertions.assertEquals("item is not currently on loan", book.checkIn());
     }
+
+    @Test
+    public void testAuthor(){
+        Book book = new Book("JUnit Rocks", a);
+
+        Assertions.assertEquals("", a.getWebsite());
+
+        a.setWebsite("www.com");
+
+        Assertions.assertEquals("www.com", a.getWebsite());
+    }
 }
diff --git a/src/test/java/com/booleanuk/core/LibraryTest.java b/src/test/java/com/booleanuk/core/LibraryTest.java
new file mode 100644
index 0000000..e56c899
--- /dev/null
+++ b/src/test/java/com/booleanuk/core/LibraryTest.java
@@ -0,0 +1,54 @@
+package com.booleanuk.core;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class LibraryTest {
+    Author a = new Author("", "", "");
+
+    @Test
+    public void testAdd(){
+        Library library = new Library();
+
+        Assertions.assertTrue(library.items.isEmpty());
+
+        library.addToStock(new Article("Funny Article", a));
+
+        Assertions.assertFalse(library.items.get(0).isOnLoan());
+        Assertions.assertEquals(1, library.items.size());
+
+        library.addToStock(new Article("Sad Article", a));
+
+        Assertions.assertFalse(library.items.get(1).isOnLoan());
+        Assertions.assertEquals(2, library.items.size());
+    }
+
+    @Test
+    public void testCheckOutAndCheckIn() {
+        Library library = new Library();
+
+        library.addToStock(new Article("Cool Article", a));
+        library.addToStock(new Book("Cool Book", a));
+        library.addToStock((new Newspaper("Cool Newspaper")));
+
+        for (Item item : library.items) {
+            Assertions.assertFalse(item.isOnLoan());
+        }
+
+        library.checkOutItem("Cool Article");
+        library.checkOutItem("Cool Book");
+        library.checkOutItem("Cool Newspaper");
+
+        Assertions.assertTrue(library.items.get(0).isOnLoan());
+        Assertions.assertTrue(library.items.get(1).isOnLoan());
+        Assertions.assertFalse(library.items.get(2).isOnLoan());
+
+        library.checkInItem("Cool Article");
+        library.checkInItem("Cool Book");
+        library.checkInItem("Cool Newspaper");
+
+        for (Item item : library.items) {
+            Assertions.assertFalse(item.isOnLoan());
+        }
+    }
+}