Robert Arthur

The Secret of Terror Castle (The Three Investigators)

By Robert Arthur

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

By M. V. Carey, Robert Arthur

The Mystery of the Flaming Footprints (Alfred Hitchcock Books)

By M.V. Carey, Robert Arthur

Alfred Hitchcock's Ghostly Gallery

By Robert Louis Stevenson, A. M. Burrage, Algernon Blackwood, Robert Arthur, F. Marion Crawford, H. G. Wells, Henry Kuttner, Lord Dunsany, Barry Wilkinson, Alfred Hitchcock

Mystery of the Stuttering Parrot

By Robert Arthur

Myst Silver Spider Ah08 3i

By Robert Arthur

Mys of Talking Skull

By Robert Arthur

The Vanishing Treasure

By Robert Arthur

Secret of Terror Castle

By Robert Arthur

Mystery of the Stuttering Parrot

By Robert Arthur

The Silver Spider

By Robert Arthur

Whispering Mummy

By Robert Arthur