The Mad Scientists' Club (1965, 2001) [1] consisting of:
"The Strange Sea Monster of Strawberry Lake" (1960), first published in Boys' Life (September 1961), with illustrations by Harold Eldridge
"The Big Egg" (1964)
"The Secret of the Old Cannon" (1963), first published in Boys' Life (January 1966), with illustrations by Marvin Friedman
"The Unidentified Flying Man of Mammoth Falls" (1962), first published in Boys' Life (November 1962), with illustrations by Harold Eldridge
"The Great Gas Bag Race" (1964), first published in Boys' Life (March 1966), with illustrations by Bernard Fuchs
"The Voice in the Chimney" (1964)
"Night Rescue" (1961), first published in Boys' Life (February 1964), with illustrations by David Stone