6 books in series

Alex Raymond's Flash Gordon

Alex Raymond's Flash Gordon is a 6-book series with 6 released primary works first released in 1974 with contributions by Con Steffanson, Alex Raymond, and Carson Bingham.

The Lion Men of Mongo
The Plague of Sound
The Space Circus
The Time Trap of Ming XIII
The Witch Queen of Mongo
The War of the Cybernauts