• Planetary X is 133 pages; ©1965
• "This novel originally appeared in Analog in two parts under the titles Ultima Thule and Pistolero" - from copyright page.
• Cover has "Complete Novel"
• The artist is not credited, no visible signature; ACE Image Library credits Gaughan
• Interior art piece is not credited, has Gaughan's "JG" on it
•
Behold the Stars is 120 pages; ©1965
• Cover has "First Book Publication"
• The artist is not credited, no visible signature
• Interior art piece is not credited, has Gaughan's "JG" on it
• This piece was reprinted in the Priory #1045 edition
