Komoku Seiri Hyojyun Mondaishu 3kyu (Bonjinsha)
This is an excellent book for revision. It consists almost solely of questions with no explanations. It’s completely in Japanese but understanding what you have to do is no problem. The useful idea behind the book is a short test you take at the start. Depending on the questions you get wrong it points you toward other sections of the book with the aim of improving your score. If you have already covered the material it would be a good book for the last 4 to 6 weeks of your JLPT study. It will help you focus on your weak points and consolidate your studies. I used an earlier version when I sat JLPT4 and found it very useful.
There are also audio tapes (I don’t think CDs are available) that go with this for the listening questions but they were so expensive I didn’t buy them.