Robert Arthur

Secret Terror Castle Ah01 3in

Mys of Flaming Footprints (Alfred Hitchcock Books, #15)

Mystery of the Wandering Cavem (The Three Investigators, #34)

3 Investigator's Bk of Mystery

Myst Silver Spider Ah08 3i (Armada S., #8)

Mys of Talking Skull (Alfred Hitchcock Books, #11)

Myst Moaning Cave Ah10 3in (Armada S., #10)

Myst. of the Scar-Faced Begger (The Three Investigators, #31)

Myst Vanishing Treasu Ah05 3in

Myst Vanish Treas-Htck (The Three Investigators, #5) (The Three Investigators, #5) (The Three Investigators, #5)

Htchck Mys Grn Ghst-Pa (The Three Investigators, #4) (The Three Investigators, #4) (The Three Investigators, #4)

Mystery of the Deadly Double (The Three Investigators, #28) (Alfred Hitchcock Books) (Alfred Hitchcock Books) (Alfred Hitchcock Books)

SEC Terro Cstl-Htck-Pa

SEC Skeletn Isl-Htck-P

Alfred Hitchcock and the Three Investigators in the Mystery of the Talking Skull (Windward Book, #23)

Myst Whisp Mum-Htck-Pa

Myst Fiery Eye-Htck-Pa

Myst Silv Spdr-Htck-Pa

Myst Screm Clk-Htck-Pa

Myst Stut Parot-Htck-P

Mystery of the Dancing Devil (The Three Investigators, #25) (The Three Investigators, #25) (The Three Investigators, #25) (Alfred Hitchcock Books) (Alfred Hitchcock Books) (Alfred Hitchcock Books)

Mystery of the Invisible Dog (The Three Investigators, #23) (The Three Investigators, #23) (The Three Investigators, #23) (Alfred Hitchcock Books) (Alfred Hitchcock Books) (Alfred Hitchcock Books)

Secret of the Haunted Mirror (The Three Investigators, #21) (Alfred Hitchcock Books) (Alfred Hitchcock Books) (Alfred Hitchcock Books)

Mystery of the Nervous Lion (The Three Investigators, #16) (Alfred Hitchcock Books) (Three Investigators Mysteries S., #16)