Created in 1963 by Stan Lee and Steve Ditko, Dr. Strange was an usually departure from the norm in superhero characters. With its lure of mysticism and spirituality, Dr. Strange soon developed an enthusiastic cult following (including writer Ken Kesey) by journeying into strange worlds and other dimensions.

Reprinted are:
Strange Tales #111: Face-To-Face with the Magic of Baron Mordo (1st appearance of Baron Mordo). Story by Stan Lee, Art by Steve Ditko
Strange Tales #116: Return to Nightmare World Story. Story by Stan Lee, Art by Steve Ditko
Strange Tales #119: Beyond the Purple Veil (1st appearance of Aggamon). Story by Stan Lee, Art by Steve Ditko
Strange Tales #120: The House of Shadows Story. Story by Stan Lee, Art by Steve Ditko
Strange Tales #123: The Challenge of Loki Story (Appearances by Thor and Loki).by Stan Lee, Art by Steve Ditko
Strange Tales #131: The Hunter and the Hunted Story. Story by Stan Lee, Art by Steve Ditko
Strange Tales #132: Face-To-Face at Last with Baron Mordo. Story by Stan Lee, Art by Steve Ditko
Strange Tales #133: A Nameless Land, A Timeless Time. Story by Stan Lee, Art by Steve Ditko
The Amazing Spider-Man Annual #2: The Wondrous World Of Dr. Strange! Story by Stan Lee, Art by Steve Ditko
Marvel Premiere #3: This World Gone Mad! Story by Stan Lee, Art by Barry Windsor-Smith