Tunnel Through Time

From Author Wars - https://authorwars.com/publications/tunnel-through-time-252451.html

Overview:

Title: Tunnel Through Time
Author: Lester del Rey
Year: 1973
Publisher: Scholastic Book Services
Price: $0.60
Pages: 160
Binding: Paperback
Type: Novel
Title Reference: Tunnel Through Time
Notes:
• "4th printing.......November 1973"
• "Illustrated by Hal Frenck"
• Interior art appears on pages 5, 30, 51, 71, 91, 111, 127, and 148.
• Cover has wrap around artwork.
• Juvenile SF.
• "Although published under del Rey's byline, this work was actually written by Paul W. Fairman." - L.W. Currey
• "PWF [Paul W. Fairman] wrote several juvenile novels based on outlines by Lester Del Rey and published under del Rey's byline, including ... 'Tunnel Through Time'". - Clute & Nicholls 1993.