2,300 books • 186 series
Book #58: Christopher Newport
Book #90: Captain John Smith
Book #151: Charles W. Dryden
Book #152: Rachel Carson
Book #153: Charles Kettering
Book #1: The Mystery at Big Ben
Book #2: Mystery at the Eiffel Tower
Book #3: The Mystery at the Roman Colosseum
Book #4: The Mystery of the Ancient Pyramid
Book #5: The Mystery on the Great Wall of China
Book #3: The Mystery at the Roman Coloseum
Book #6: The Mystery on the Great Barrier Reef