"Century 21 FX Unseen Untold" is a Stub.
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Century 21 FX Unseen Untold is a book.

Written by Alan Shubrook and released in 2007, Century 21 FX Unseen Untold documents his time at A.P. Films / Century 21 and features a large number of "never published before" photographs. The book also documents the making of numerous APF / C21 productions (with a focus on the special effects and the model-making), including but not limited to Thunderbirds, Captain Scarlet and the Mysterons, Joe 90, The Secret Service, and UFO'.

The book was reprinted in 2016.