diff --git a/rust-cookbook/src/algorithms/sorting/sort_struct.md b/rust-cookbook/src/algorithms/sorting/sort_struct.md
index ba73298..cd43070 100644
--- a/rust-cookbook/src/algorithms/sorting/sort_struct.md
+++ b/rust-cookbook/src/algorithms/sorting/sort_struct.md
@@ -15,9 +15,9 @@ struct Person {
 }
 
 impl Person {
-    pub fn new(name: String, age: u32) -> Self {
+    pub fn new(name: &str, age: u32) -> Self {
         Person {
-            name,
+            name: name.to_string(),
             age
         }
     }
@@ -25,9 +25,9 @@ impl Person {
 
 fn main() {
     let mut people = vec![
-        Person::new("Zoe".to_string(), 25),
-        Person::new("Al".to_string(), 60),
-        Person::new("John".to_string(), 1),
+        Person::new("Zoe", 25),
+        Person::new("Al", 60),
+        Person::new("John", 1),
     ];
 
     // Sort people by derived natural order (Name and age)
@@ -36,9 +36,9 @@ fn main() {
     assert_eq!(
         people,
         vec![
-            Person::new("Al".to_string(), 60),
-            Person::new("John".to_string(), 1),
-            Person::new("Zoe".to_string(), 25),
+            Person::new("Al", 60),
+            Person::new("John", 1),
+            Person::new("Zoe", 25),
         ]);
 
     // Sort people by age
@@ -47,9 +47,9 @@ fn main() {
     assert_eq!(
         people,
         vec![
-            Person::new("Al".to_string(), 60),
-            Person::new("Zoe".to_string(), 25),
-            Person::new("John".to_string(), 1),
+            Person::new("Al", 60),
+            Person::new("Zoe", 25),
+            Person::new("John", 1),
         ]);
 
 }
diff --git a/rust-cookbook/src/encoding/csv/delimiter.md b/rust-cookbook/src/encoding/csv/delimiter.md
index 50d2128..cf719aa 100644
--- a/rust-cookbook/src/encoding/csv/delimiter.md
+++ b/rust-cookbook/src/encoding/csv/delimiter.md
@@ -18,9 +18,9 @@ struct Record {
 use csv::ReaderBuilder;
 
 fn main() -> Result<(), Error> {
-    let data = "name\tplace\tid
-		Mark\tMelbourne\t46
-		Ashley\tZurich\t92";
+    let data = "name\tplace\tid\n\
+        Mark\tMelbourne\t46\n\
+        Ashley\tZurich\t92";
 
     let mut reader = ReaderBuilder::new().delimiter(b'\t').from_reader(data.as_bytes());
     for result in reader.deserialize::<Record>() {
diff --git a/rust-cookbook/src/encoding/string/percent-encode.md b/rust-cookbook/src/encoding/string/percent-encode.md
index 1e47602..f617d5b 100644
--- a/rust-cookbook/src/encoding/string/percent-encode.md
+++ b/rust-cookbook/src/encoding/string/percent-encode.md
@@ -2,9 +2,9 @@
 
 [![percent-encoding-badge]][percent-encoding] [![cat-encoding-badge]][cat-encoding]
 
-Encode an input string with [percent-encoding] using the [`utf8_percent_encode`]
-function from the `percent-encoding` crate. Then decode using the [`percent_decode`]
-function.
+Encode an input string with [percent-encoding][percent-encoding-wiki] using the
+[`utf8_percent_encode`] function from the `percent-encoding` crate. Then decode
+using the [`percent_decode`] function.
 
 ```rust,edition2018
 use percent_encoding::{utf8_percent_encode, percent_decode, AsciiSet, CONTROLS};
@@ -38,4 +38,5 @@ a `String`.
 [`percent_decode`]: https://docs.rs/percent-encoding/*/percent_encoding/fn.percent_decode.html
 [`utf8_percent_encode`]: https://docs.rs/percent-encoding/*/percent_encoding/fn.utf8_percent_encode.html
 
-[percent-encoding]: https://en.wikipedia.org/wiki/Percent-encoding
+[percent-encoding]: https://docs.rs/percent-encoding/
+[percent-encoding-wiki]: https://en.wikipedia.org/wiki/Percent-encoding
diff --git a/rust-cookbook/src/science/mathematics/trigonometry/side-length.md b/rust-cookbook/src/science/mathematics/trigonometry/side-length.md
index 951329c..02b0cb1 100644
--- a/rust-cookbook/src/science/mathematics/trigonometry/side-length.md
+++ b/rust-cookbook/src/science/mathematics/trigonometry/side-length.md
@@ -2,11 +2,11 @@
 
 [![std-badge]][std] [![cat-science-badge]][cat-science]
 
-Calculates the length of the hypotenuse of a right-angle triangle with an angle of 2 radians and opposite side length of 80.
+Calculates the length of the hypotenuse of a right-angle triangle with an angle of 1 radian and opposite side length of 80.
 
 ```rust,edition2018
 fn main() {
-    let angle: f64 = 2.0;
+    let angle: f64 = 1.0;
     let side_length = 80.0;
 
     let hypotenuse = side_length / angle.sin();
diff --git a/rust-cookbook/src/web/clients/download/basic.md b/rust-cookbook/src/web/clients/download/basic.md
index 63168ca..d246348 100755
--- a/rust-cookbook/src/web/clients/download/basic.md
+++ b/rust-cookbook/src/web/clients/download/basic.md
@@ -6,12 +6,12 @@ Creates a temporary directory with [`tempfile::Builder`] and downloads
 a file over HTTP using [`reqwest::get`] asynchronously.
 
 Creates a target [`File`] with name obtained from [`Response::url`] within
-[`tempdir()`] and copies downloaded data into it with [`io::copy`].
+[`tempdir()`] and writes downloaded data into it with [`Writer::write_all`].
 The temporary directory is automatically removed on program exit.
 
 ```rust,edition2018,no_run
 use error_chain::error_chain;
-use std::io::copy;
+use std::io::Write;
 use std::fs::File;
 use tempfile::Builder;
 
@@ -41,15 +41,15 @@ async fn main() -> Result<()> {
         println!("will be located under: '{:?}'", fname);
         File::create(fname)?
     };
-    let content =  response.text().await?;
-    copy(&mut content.as_bytes(), &mut dest)?;
+    let content =  response.bytes().await?;
+    dest.write_all(&content)?;
     Ok(())
 }
 ```
 
 [`File`]: https://doc.rust-lang.org/std/fs/struct.File.html
-[`io::copy`]: https://doc.rust-lang.org/std/io/fn.copy.html
 [`reqwest::get`]: https://docs.rs/reqwest/*/reqwest/fn.get.html
 [`Response::url`]: https://docs.rs/reqwest/*/reqwest/struct.Response.html#method.url
 [`tempfile::Builder`]: https://docs.rs/tempfile/*/tempfile/struct.Builder.html
-[`tempdir()`]: https://docs.rs/tempfile/3.1.0/tempfile/struct.Builder.html#method.tempdir
+[`tempdir()`]: https://docs.rs/tempfile/*/tempfile/struct.Builder.html#method.tempdir
+[`Writer::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all
diff --git a/rust-cookbook/src/web/clients/download/partial.md b/rust-cookbook/src/web/clients/download/partial.md
index d288573..9b00bc0 100644
--- a/rust-cookbook/src/web/clients/download/partial.md
+++ b/rust-cookbook/src/web/clients/download/partial.md
@@ -5,7 +5,7 @@
 Uses [`reqwest::blocking::Client::head`] to get the [Content-Length] of the response.
 
 The code then uses [`reqwest::blocking::Client::get`] to download the content in
-chunks of 10240 bytes, while printing progress messages. This exmple uses the synchronous
+chunks of 10240 bytes, while printing progress messages. This example uses the synchronous
 reqwest module.  The [Range] header specifies the chunk size and position.
 
 The Range header is defined in [RFC7233][HTTP Range RFC7233].