JLPT N1 Mock Test books

I used the N2 version of this book for studying and it was great. It has lots of questions for each question type, more than a typical mock test has. It also has one or two full mock tests in the back if I recall (not 100% on this). I imagine the N1 version would be just as useful for practice.
http://www.amazon.co.jp/dp/4757418779