diff --git a/src/main/java/com/booleanuk/core/Article.java b/src/main/java/com/booleanuk/core/Article.java
index 1e359b0..5000741 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 ReadMaterials{
+    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..4a67aa6
--- /dev/null
+++ b/src/main/java/com/booleanuk/core/Author.java
@@ -0,0 +1,13 @@
+package com.booleanuk.core;
+
+public class Author {
+    public String name;
+    public String email;
+    public String website;
+
+    public Author(String name, String email,String website){
+        this.name = name;
+        this.email = email;
+        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..f81c569 100644
--- a/src/main/java/com/booleanuk/core/Book.java
+++ b/src/main/java/com/booleanuk/core/Book.java
@@ -1,35 +1,10 @@
 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 class Book extends ReadMaterials{
+    Author author;
+    public Book(String title,Author author) {
+        super(title);
+        this.author = author;
     }
 
-    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..96a6ffc 100644
--- a/src/main/java/com/booleanuk/core/Library.java
+++ b/src/main/java/com/booleanuk/core/Library.java
@@ -1,53 +1,24 @@
 package com.booleanuk.core;
 
+import java.util.ArrayList;
 import java.util.List;
 
 public class Library {
-    List<Article> articles;
-    List<Book> books;
-    List<Newspaper> newspapers;
 
-    public void addToStock(Article item) {
-        this.articles.add(item);
-    }
+    List<ReadMaterials> readMaterials;
 
-    public void addToStock(Book item) {
-        this.books.add(item);
+    public Library(){
+        this.readMaterials = new ArrayList<>();
     }
-
-    public void addToStock(Newspaper item) {
-        this.newspapers.add(item);
+    public void addToStock(ReadMaterials item) {
+        this.readMaterials.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))
+    public String checkInItem(String title) {
+        List<ReadMaterials> filtered = this.readMaterials.stream()
+                .filter(item -> item.title.equals(title))
                 .toList();
 
         if (filtered.size() < 1) {
@@ -57,9 +28,9 @@ public String checkInBook(String title) {
         return filtered.get(0).checkIn();
     }
 
-    public String checkOutBook(String title) {
-        List<Book> filtered = this.books.stream()
-                .filter(book -> book.title.equals(title))
+    public String checkOutItem(String title) {
+        List<ReadMaterials> filtered = this.readMaterials.stream()
+                .filter(item -> item.title.equals(title))
                 .toList();
 
         if (filtered.size() < 1) {
@@ -69,27 +40,5 @@ public String checkOutBook(String title) {
         return filtered.get(0).checkOut();
     }
 
-    public String checkInNewspaper(String title) {
-        List<Newspaper> filtered = this.newspapers.stream()
-                .filter(newspaper -> newspaper.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 checkOutNewspaper(String title) {
-        List<Newspaper> filtered = this.newspapers.stream()
-                .filter(newspaper -> newspaper.title.equals(title))
-                .toList();
 
-        if (filtered.size() < 1) {
-            return "item is not part of the library's collection";
-        }
-
-        return filtered.get(0).checkOut();
-    }
 }
diff --git a/src/main/java/com/booleanuk/core/Newspaper.java b/src/main/java/com/booleanuk/core/Newspaper.java
index 8411d9c..fe7d2af 100644
--- a/src/main/java/com/booleanuk/core/Newspaper.java
+++ b/src/main/java/com/booleanuk/core/Newspaper.java
@@ -1,16 +1,9 @@
 package com.booleanuk.core;
 
-public class Newspaper {
-    String title;
-
-    boolean onLoan = false;
+public class Newspaper extends ReadMaterials {
 
     public Newspaper(String title) {
-        this.title = title;
-    }
-
-    public boolean isOnLoan() {
-        return onLoan;
+        super(title);
     }
 
     public String checkIn() {
diff --git a/src/main/java/com/booleanuk/core/ReadMaterials.java b/src/main/java/com/booleanuk/core/ReadMaterials.java
new file mode 100644
index 0000000..7e85f41
--- /dev/null
+++ b/src/main/java/com/booleanuk/core/ReadMaterials.java
@@ -0,0 +1,35 @@
+package com.booleanuk.core;
+
+public class ReadMaterials {
+    public String title;
+    public boolean onLoan;
+
+    public ReadMaterials(String title){
+        this.title = title;
+        this.onLoan = false;
+    }
+
+    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/test/java/com/booleanuk/core/ArticleTest.java b/src/test/java/com/booleanuk/core/ArticleTest.java
index 00bbaeb..561cb43 100644
--- a/src/test/java/com/booleanuk/core/ArticleTest.java
+++ b/src/test/java/com/booleanuk/core/ArticleTest.java
@@ -6,13 +6,15 @@
 class ArticleTest {
     @Test
     public void shouldCheckOutIfAvailable() {
-        Article article = new Article("JUnit Rocks");
+        Author author = new Author("Programmer Programmersom","prg@email.no","prg.com");
+        Article article = new Article("JUnit Rocks",author);
         Assertions.assertEquals("item has been checked out", article.checkOut());
     }
 
     @Test
     public void shouldDeclineIfNotAvailableToCheckout() {
-        Article article = new Article("JUnit Rocks");
+        Author author = new Author("Programmer Programmersom","prg@email.no","prg.com");
+        Article article = new Article("JUnit Rocks",author);
         article.checkOut();
 
         Assertions.assertEquals("item is currently on loan", article.checkOut());
@@ -20,7 +22,8 @@ public void shouldDeclineIfNotAvailableToCheckout() {
 
     @Test
     public void shouldCheckInIfOnLoan() {
-        Article article = new Article("JUnit Rocks");
+        Author author = new Author("Programmer Programmersom","prg@email.no","prg.com");
+        Article article = new Article("JUnit Rocks",author);
         article.checkOut();
 
         Assertions.assertEquals("item has been checked in", article.checkIn());
@@ -28,7 +31,8 @@ public void shouldCheckInIfOnLoan() {
 
     @Test
     public void shouldDeclineCheckInIfNotOnLoan() {
-        Article article = new Article("JUnit Rocks");
+        Author author = new Author("Programmer Programmersom","prg@email.no","prg.com");
+        Article article = new Article("JUnit Rocks",author);
 
         Assertions.assertEquals("item is not currently on loan", article.checkIn());
     }
diff --git a/src/test/java/com/booleanuk/core/BookTest.java b/src/test/java/com/booleanuk/core/BookTest.java
index 180a165..f552d5c 100644
--- a/src/test/java/com/booleanuk/core/BookTest.java
+++ b/src/test/java/com/booleanuk/core/BookTest.java
@@ -6,13 +6,15 @@
 public class BookTest {
     @Test
     public void shouldCheckOutIfAvailable() {
-        Book book = new Book("JUnit Rocks");
+        Author author = new Author("Programmer Programmersom","prg@email.no","prg.com");
+        Book book = new Book("JUnit Rocks",author);
         Assertions.assertEquals("item has been checked out", book.checkOut());
     }
 
     @Test
     public void shouldDeclineIfNotAvailableToCheckout() {
-        Book book = new Book("JUnit Rocks");
+        Author author = new Author("Programmer Programmersom","prg@email.no","prg.com");
+        Book book = new Book("JUnit Rocks",author);
         book.checkOut();
 
         Assertions.assertEquals("item is currently on loan", book.checkOut());
@@ -20,7 +22,8 @@ public void shouldDeclineIfNotAvailableToCheckout() {
 
     @Test
     public void shouldCheckInIfOnLoan() {
-        Book book = new Book("JUnit Rocks");
+        Author author = new Author("Programmer Programmersom","prg@email.no","prg.com");
+        Book book = new Book("JUnit Rocks",author);
         book.checkOut();
 
         Assertions.assertEquals("item has been checked in", book.checkIn());
@@ -28,7 +31,8 @@ public void shouldCheckInIfOnLoan() {
 
     @Test
     public void shouldDeclineCheckInIfNotOnLoan() {
-        Book book = new Book("JUnit Rocks");
+        Author author = new Author("Programmer Programmersom","prg@email.no","prg.com");
+        Book book = new Book("JUnit Rocks",author);
 
         Assertions.assertEquals("item is not currently on loan", book.checkIn());
     }
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..0cf373c
--- /dev/null
+++ b/src/test/java/com/booleanuk/core/LibraryTest.java
@@ -0,0 +1,39 @@
+package com.booleanuk.core;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+
+public class LibraryTest {
+    @Test
+    public void testAddBookToList(){
+        Author author = new Author("JRR","JRR@email.no","Tolkien.com");
+        ReadMaterials book = new Book("Lotr",author);
+        Library library = new Library();
+        library.addToStock(book);
+        Assertions.assertEquals(book, library.readMaterials.get(0));
+    }
+
+    @Test
+    public void testCheckOutItem(){
+        Author author = new Author("JRR","JRR@email.no","Tolkien.com");
+        ReadMaterials book = new Book("Lotr",author);
+        Library library = new Library();
+        library.addToStock(book);
+
+        library.checkOutItem("Lotr");
+        Assertions.assertTrue(book.onLoan);
+    }
+    @Test
+    public void testCheckInItem(){
+        Author author = new Author("JRR","JRR@email.no","Tolkien.com");
+        ReadMaterials book = new Book("Lotr",author);
+        Library library = new Library();
+        library.addToStock(book);
+
+        library.checkOutItem("Lotr");
+        library.checkInItem("Lotr");
+        Assertions.assertFalse(book.onLoan);
+    }
+}