Cloak-and-dagger bibliography: An annotated guide to spy fiction, 1937-1975

Spy Sinker: A Novel

Puzzle Adventures: The Pyramid Plot/the Emerald Conspiracy/the Invisible Spy (Usborne Puzzle Adventures, Book 3)

It's Hard to Be a Russian Spy

Spy In the House of Love

George Washington -- Soldier, Hero, President (DK Readers, Level 3: Reading Alone)

I Spy Little Book (I Spy Books)

Spy!: An anthology of espionage stories;

Agent 146: The True Story of a Nazi Spy in America

Commander Toad and the Intergalactic Spy