156 books • 21 series
Book #6: Mystery of Skeleton Island
Book #7: Mystery of the Fiery Eye
Book #11: Mys of Talking Skull
Book #15: Mys of Flaming Footprints
Book #31: Mystery of the Scar-faced Beggar
Book #15: Htchk Myst Flam Ftprnt
Book #27: Htchck Mys Magic Crcl
Book #27: Hchck Myst Magic Circle
Book #18: Htchck Mys Shrnkng Hse
Book #22: Hchck Mys Dead Man Riddl
Book #21: Hchck SEC Haunted Mirror
Book #26: Hitck Mys Headless Horse
Book #28: Hchck Myst Deadly Double
Myst Kidnapped Whale
Book #1: Htchck Scrt Terror Cas
Book #1: Secret of Terror Castl
Book #2: Myst Stuttering Parrot
Book #2: Ti #02 Myst of the Stuttering
Book #4: Htchck Mys Grn Ghst-Pa
Book #5: The Mystery of the Vanishing Treasure
Book #5: Myst Vanish Treas-Htck
Book #11: The Mystery of the Talking Skull
Book #21: Secret of Haunted Mirr
Book #10: Myst of Moaning Cave
Book #14: Mystery of the Coughing Dragon
Book #16: Mystery of the Nervous Lion