Trillions

From Author Wars - https://authorwars.com/publications/trillions-438372.html

Overview:

Title: Trillions
Author: Nicholas Fisk
Year: 1973
ISBN-10: 0394926013
Publisher: Pantheon Books
Price: $4.95
Pages: 158
Binding: Hardcover
Type: Novel
Title Reference: Trillions
Notes: No printed date except a copyright 1971. Cover art not credited, and printed directly onto board bindings. No dust jacket. Price from: https://www.nytimes.com/1974/02/24/archives/tripping-the-sciencefantastic-caught-in-the-web.html. "Also available in Gibraltar Library Binding" on back flap of trade edition on Archive.org; ISBN is for the library edition, trade ISBN is 0-394-82601-9. Price and month ("4/73") on front flap.