Sobol, Donald J., Encyclopedia Brown, Super Sleuth
With a knack for trivia, Encyclopedia solves mysteries for the neighborhood kids through his own detective agency. But his dad is also the chief of police, and every night Encyclopedia helps him solve his most baffling crimes. Join Encyclopedia Brown as he solves ten new and even more confounding mysteries, including a case of a stolen watch, disappearing money, a headless ghost, and more. And with the clues given in each case, you can solve these mysteries too! Interactive and chock-full of interesting bits of information, it's classic Encyclopedia Brown!