Triplanetary

From Author Wars - https://authorwars.com/publications/triplanetary-493608.html

Overview:

Title: Triplanetary
Author: E. E. 'Doc' Smith
Year: 1985
ISBN-10: 0586037608
Publisher: Panther
Price: £1.95
Pages: 254
Binding: Paperback
Type: Novel
Title Reference: Triplanetary
Notes: 12th printing as per copyright page.
$7.95 in NZ, $5.95 in Australia.
Artist not credited, same as previous printings.
Book one is titled "Dawn", book two "The World War", book three "Triplanetary".