It was first published in hardcover by Walker & Company in 1977, and in paperback by Avon Books in 1979.

A British edition illustrated by Geoff Taylor and adding one additional story was issued by Pan Books in 1982.

(The eleventh Larry story, "Zip Code," from Boys' Life September 1986, does not appear in any book, and the twelfth and final story, "A Friend Calls," was never published.

This article about a collection of mystery short stories published in the 1970s is a stub.

You can help Wikipedia by expanding it.This article about a collection of short stories for children published in the 1970s is a stub.