For Boys Only facts for kids
For Boys Only: The Biggest, Baddest Book Ever is a non-fiction book by Marc Aronson and HP Newquist. The book has 100 short articles on subjects that appeal to boys, such as biting spiders, Easter Island, invisibility cloaks, and fake blood. It also includes a set of 39 codes for the reader to solve, which vary in difficulty.
For Boys Only Facts for Kids. Kiddle Encyclopedia.