Coffeescript at CodeSchool
If you need to know if Coffeescript is your future favorite language and you don’t want learn tutorial this is the best a practical approach.
The little book of Coffeescript
Very good book to know the principles of Coffeescript and sums up the language in an easy and friendly way.
Essential if you want to know more about coffeescript.
Coffeescript, un pequeño gran libro
Spanish book that explain very good all about coffeescript for javascript programmers, especially some concepts that programmers often do not consider.
Coffeescript, un pequeño gran libro
HardRock Coffeescript
Love this book because is very easy to read, explain the major features of the language and also design pattern. In general is a resume of others big book. I highly recommend it.
Cofeescript Cookbook
This book is awesome. Explain the concept but starting from the problem. Including design patterns and others typical cuestions.
Bonus: Coffeescript on Reddit
http://www.reddit.com/r/coffeescript/