Gary Allen's most popular book is None dare call it conspiracy with 8 saves and an average rating of -.
Series
2 primary booksAuthored 100% of series
None Dare Call It Conspiracy is a 2-book series with 2 released primary works first released in 1971 with contributions by Gary Allen and Larry Abraham.
Series
2 released booksAuthored 0% of series
One Day in the... is a 2-book series with 2 released primary works first released in 1986 with contributions by Richard Cowdrey Bob Marstall Jean Craighead George and Jean Craighead George.