The Makeshift Rocket

Originally titled Bicycle Built for Brew

by Poul Anderson

Ace first edition January 1, 1962
Open Road Media Sci-Fi & Fantasy ebook
    version December 30, 2014

Cover art is from the ebook version
(Library loan ebook via Hoopla)

114 pages

The original cover art is far better since it
portrays both of the rockets as they were
actually described in the book