28 books • 8 series
Book #1: The Valley of the Kings
Book #26: The Phantom Submarine
Book #46: The Deadly Shadow
Book #88: Master of Kung Fu
Book #102: Master of Tae Kwon Do
Book #1: Indiana Jones
Book #9: Who Killed Harlowe Thrombey?
Book #36: The Secret Treasure of Tibet
Book #56: The Enchanted Kingdom
Book #70: Invaders of the Planet Earth
Book #3: Island of Doom
Book #15: How I Became a Freak
Book #7: China
Book #8: U.S.A.
Book #1: Tenopia Island
Book #3: Terror on Kabran
Book #3: Revolution in Russia
Book #5: African Safari
Book #6: Behind the Great Wall