Donald Sobol

Encyclopedia Brown comes by his name honestly: he often seems like a walking book of knowledge. But this fifth grader knows how to put his knowledge to use — much to the disgust of the bad guys! At the end of each chapter, Encyclopedia Brown solves the mystery and readers are asked if they know how. The clever answers are at the book of the book.

Though this book is more for budding detectives than budding spies, it has many of the same appealing factors—listening, clue-gathering, and crime-solving. A classic that appeals to elementary-school students, this is also fun for read-alouds.