The explanations are very easy to read and understand. The author put a lot of effort to help the reader understand the material.

— kimny

Thanks to this book, I could understand topics that I didn't understand very well. It's also helpful for Rails development.

— junichi_develop

There's a lot of sample code in this book, and I think it's very easy to understand because Junichi shows you what's wrong with the code at first.

— yuki3738

The author always keeps his readers in his mind. The book made me feel like I was listening to him give a speech at a conference.

— kodak

To sum it up, if you write code as a profession, this is a book you should have to educate yourself in Ruby.

— luccafort

All beginners and intermediate programmers have no need to hesitate over buying this book. If you're going to write Ruby code as a profession in the future, it would be a very good investment to buy such a practical and easy-to-understand book.

— sinsoku

If you had difficulties while trying a Ruby on Rails tutorial, please buy this book. You'll be really thankful you did.

— Luigi (Amazon customer review)