This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
People always ask which books are good for this exam.
I've been recently reading a book called Rest in Practice: Hypermedia and Systems Architecture by Jim Webber, Savas Parastatidis and Ian Robinson.
I am reading chapter 3 now, this book does a good job introducing Rest concepts.
Besides Ivan, MZ's notes, RMH's book and Java Web Service Up and Running, I suggest this Rest in Practice book for supplemental reference.