Robert Arthur

Book #8: The Silver Spider

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 #13: Secret of the Crooked Cat

Book #22: Mystery of the Dead Man's Riddle

Book #26: Mystery of the Headless Horse

Book #33: Mystery of the Purple Pirate

Book #38: Mystery of the Smashing Glass

Book #15: Mystery of the Flaming Footprints

Book #32: Mystery of the Blazing Cliffs

Book #38: Mystery of the Smashing Glass

Book #39: Mystery of the Trail of Terror

Book #4: Mystery of the Green Ghost

Book #8: Myst Silver Spider Ah08 3i

Book #10: Myst Moaning Cave Ah10 3in

Book #6: Hollywood Horror

Case of the Dancing Dinosaur

Book #7: Case of the House of Horrors

Book #8: Case of the Savage Statue

Book #8: Case Savage Statue #8

Book #5: An Ear for Danger #5

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 #10: Myst of Moaning Cave

Book #11: The Mystery of the Talking Skull

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 #2: Murder to Go

Book #4: Funny Business

Book #5: An Ear for Danger #5

Book #6: Thriller Diller #6

Book #6: Thriller Diller Bk 6

Book #5: An Ear for Danger #5

Book #14: Mystery of the Coughing Dragon

Book #16: Mystery of the Nervous Lion

Book #1: Secret of Terror Castle

Book #3: Whispering Mummy

Book #5: The Vanishing Treasure

Book #6: Secret of Skeleton Island

Book #1: Secret of Terror Castle

Book #2: The Mystery of the Stuttering Parrot

Book #3: Mystery of the Whispering Mummy

Book #4: Mystery of the Green Ghost

Book #5: The Mystery of the Vanishing Treasure