9 books in series

The Phantom Avon: The Complete Series

The Phantom Avon: The Complete Series is a 9-book series with 9 released primary works first released in 1967 with contributions by Lee Falk, Basil Copper, Frank S. Shawn, Warren Shanahan, and Carson Bingham.

The Phantom: The Complete Avon Novels: Volume #1: The Story of the The Phantom: The Ghost Who Walks
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The Scorpia Menace

The Veiled Lady
The Golden Circle
The Mysterious Ambassador
The Mystery Of The Sea Horse
Killer's Town
The Swamp Rats
Cover 7

The Island of Dogs

The Curse of the Two-Headed Bull