Riddles, Facts and Words (Paperback) (ISBN-13: 9798887047430)

FIRST OF ALL, YOU'LL LOVE THIS BOOK. JUST READ IT ONCE.
You will improve your IQ while solving the riddles. You will gain much important knowledge when you go through the FACTS section and your vocabulary will surely get better as well.

And don't miss the special riddles towards the end of the book.