Book 6


Book 7

Mystery of the Fiery Eye

by Robert Arthur

Published September 1969
Three junior detectives solve a mystery involving a collection of antique busts, a legacy, a strange letter, and a red ruby.

Book 11

Mys of Talking Skull

by Robert Arthur

Published 29 October 1981

Book 15

Mys of Flaming Footprints

by M.V. Carey and Robert Arthur

Published 15 November 1982

Book 31


Book 38


Book 39


Three young detectives travel abroad to solve a mystery involving a silver spider and a political plot that endangers the life of a young prince.

Three young detectives undertake a case involving an Egyptian mummy that whispers, but only to one man.

Secret of Terror Castle

by Robert Arthur

Published October 1967

Mystery of the Green Ghost

by Robert Arthur

Published 1 October 1965









The three investigators take on two mysteries: the disappearance of an ancient jeweled Japanese belt from a museum exhibit and the strange antics of a group of gnomes around an elderly woman's house.