"The Ultimate Book of Logic Puzzles and Brainteasers" is by Erwin Brecher. The book conatins puzzles in mathematics, logic and physics, as well as some puzzles which escape definition. Here are some examples for you to try:

Father and Grandfather

Is it possible for one's grandfather to be younger than onoe's father?

Product

What is the product of the following series?

(x-a)(x-b)(x-c)...(x-z)

A Unique Number

The following number is the only one of its kind. Can you figure out what is so special about it?

8,549,176,320

Interior Angles

Prove that the three angles of any triangle total 180 degrees (in Euclid geometry...hint: use a picture)