I love Strip Happy - I have made at least two quilts from this book and plan to make a couple more. :)
The first jelly roll book by Pam and Nicky Lintott is really good - I think I want to make every quilt in that book. They seemed to have a fresh look and a distinctive style in Jelly Roll Quilts. Every page is gorgeous and the instructions are clear and easy to follow. The second one was pretty good, too.
I thought the last one they did is not nearly as good as the first one or even the second. They have a call out for submissions for their fourth.