minor readme change

Author: liv

README.md

@@ -6,7 +6,7 @@ Greetings and welcome to `rustlings`. This project contains small exercises to g
 
 Alternatively, for a first-time Rust learner, there's several other resources:
 
-- [The Book](https://doc.rust-lang.org/book/index.html) - The most comprehensive resource for learning Rust, but a bit theoretical sometimes
+- [The Book](https://doc.rust-lang.org/book/index.html) - The most comprehensive resource for learning Rust, but a bit theoretical sometimes. You will be using this along with Rustlings!
 - [Rust By Example](https://doc.rust-lang.org/rust-by-example/index.html) - Learn Rust by solving little exercises! It's almost like `rustlings`, but online
 
 ## Getting Started