Mr. Bass's Planetoid

Mr. Bass's Planetoid

First edition
Author	Eleanor Cameron
Illustrator	Louis Darling
Language	English
Series	The Mushroom Planet Books
Genre	Science fiction Children's literature
Publisher	Little, Brown and Company
Publication date	1958
Publication place	United States
Media type	Print (Hardcover)
Pages	227
Preceded by	Stowaway to the Mushroom Planet
Followed by	A Mystery for Mr. Bass

Mr. Bass's Planetoid is a 1958 children's science fiction novel by Canadian author Eleanor Cameron. The novel followed The Wonderful Flight to the Mushroom Planet (1954) and Stowaway to the Mushroom Planet (1956).

Plot introduction

Prewytt Brumblydge, inventor of the Brumblitron, must be found in order to disable the device before it destroys the Earth. This is a job for Mr. Bass, but he has disappeared, so the boys pore over his notebook for clues and go spacefaring to find Brumblydge. This time, instead of journeying to Basidium, they fly to an airless rock named Lepton that orbits 1,000 miles above the Earth's surface. This third Mushroom Planet adventure is illustrated by Louis Darling, illustrator of the Henry and Ramona series.

This novel also introduced the fictional metal Brumblium, a greenish metal, that shows as infragreen on a spectroscope, and is twice the density of uranium.

See also

• A Mystery for Mr. Bass, the sequel volume to this story.