Tunnel in the Sky

From Author Wars - https://authorwars.com/publications/tunnel-in-the-sky-87446.html

Overview:

Title: Tunnel in the Sky
Author: Robert A. Heinlein
Year: 1985
ISBN-10: 0345332121
Publisher: Del Rey / Ballantine
Price: $2.95
Pages: 214
Binding: Paperback
Type: Novel
Title Reference: Tunnel in the Sky
Notes:
• "First Ballantine Books Edition: March 1977" • Eighth Printing: September 1985"; no number line • "Cover art by DArrell Sweet" on copyright page, the artwork is also signed • OCLC has no record for the ISBN [2017-12-15]