Invaders from Rigel

Invaders from Rigel is a science fiction novel by American writer Fletcher Pratt. It was first published in hardcover by Avalon Books in 1960. The first paperback edition was issued by Airmont Books in January 1964 and reprinted in December 1972, May 1973, January 1976, and at least one later occasion. The novel has also been translated into Italian. The book is an expansion of the author's novella "The Onslaught from Rigel," originally published in the magazine Wonder Stories Quarterly in the issue for Winter 1932. Pratt reused the name of the protagonist, Benjamin Franklin Ruby, in the form B. F. Ruby as an authorial pseudonym for later stories.