Peril of the Starmen / The Forgotten Planet

From Author Wars - https://authorwars.com/books/peril-of-the-starmen--the-forgotten-planet-2506755.html

Overview:

Title: Peril of the Starmen / The Forgotten Planet
Author: Gregory Luce
Year: 2011
Type: Omnibuses

Variant Titles:

2011. Peril of the Starmen / The Forgotten Planet