Well I used a couple of books with good questions in them last year, and they were:
- Nelson Peak Performance
- A+ Publishing's PE Notes
Now even though I didn't use Peak Performance much because answering questions isn't really my thing, the book does have a chapter of questions dedicated to each topic, which results in a hell of a lot of pretty good questions. Answers are at the back too, so that's always good.
PE Notes is great as a summary of the subject, but it does have a fair few questions for each topic dotted throughout the book. The questions are pretty good, and there are answers at the back as well.
So yeah those books are both worth getting I reckon.
I think there are other exam books out there, but I dunno the names lol sorry. But yeah hope that helps a little bit.