Bamber Gascoigne's Challenging Quiz Book has been around since around 2007 but I only managed to get my hands on it at the start of this year. I have found this to be a fantastic book that tests every aspect of your quizzing. The questions are pitched at quite a hard level so no time is wasted with easy questions you see in every quiz book and there is certainly no filler here. Just top quality question writing, some good explanations of answers and plenty to learn.
Worth a look!