- If ever there was a book to make you switch off your television set, The Dangerous Book for Boys was it. From the same authors, these hardbound, foil-embossed pocket editions for boys (and girls) 8 to 80 are packed with fascinating facts and tantalizing trivia. With Things to Know you can impress your friends and family with your knowledge of the solar system, your ability to name the kings and queens of England, and your brilliance at unraveling codes and ciphers. Ever wanted to know what the best ever scientific discoveries were? Or the most gruesome deaths of all time? Or how many great men were assassinated? Facts, Figures and Fun has your answers.