Brain Games Useless Information Word Search contains 84 word search puzzles to keep your brain humming. Every puzzle is themed, and comes with interesting bits of random information about science, history, inventions, and pop culture. Find hundreds of words related to the puzzle themes . Each puzzle is paired with a summary of an article from The Book of Useless Information , ISBN-13: 978-1450807463. Answer key found at the back of the book. 192 pages.