Reddit mentions of Power Tools for Reason 3.0: Master the World's Most Popular Virtual Studio Software

Here's one tip: For $4 - $10 you can pick up the book "Power Tools for Reason 3.0".

http://www.amazon.com/gp/offer-listing/0879308613/ref=dp_olp_all_mbc?ie=UTF8&condition=all

Yeah, 3.0. Don't get 6.0 - it's not by the same author. The 3.0 version is 90% relevant anyhow and has some great information. It's designed primarily with examples that show interesting routings and combinators that yield all kinds of different sounds and effects. The example-driven approach really helps you to get familiar with the nuts and bolts of Reason. Make sure you go through the process of building the examples - I don't think it would be the same to just load a patch. Anyhow, I'm a big fan.

Get any of the Reason books that function as expanded user manuals and just digest every segment of each device until you understand them. Once you understand, experimentation can begin!

Also, Peff is the man. I'd even recommend picking up his power tools book (even though the version is outdated, the insights are amazing). http://www.amazon.com/Power-Tools-Reason-3-0-Software/dp/0879308613/ref=la_B001KITWI2_1_1?ie=UTF8&qid=1368307588&sr=1-1