A few come to mind, over the course of my childhood up to and including high-school. The "Mad Scientist's Club" series The Great Brain Those "Encyclopedia Br

A few come to mind, over the course of my childhood up to and including high-school. The "Mad Scientist's Club" series The Great Brain Those "Encyclopedia Brown" stories The "The Three Investigators" series The Mysterious Island by Jules Verne The original Doyle "Sherlock Holmes" canon The Soul Of A New Machine by Tracy Kidder The Lord of the Rings by Tolkien Nineteen Eighty Four