spy stories

A family's visit to a country under the rule of a dictator involves the children in a startling revolutionary secret and leads them to suspect that their stepfather is a spy.

When Frank and Joe Hardy investigate a hijacking, they become involved with industrial spies and a pursuit into the Canadian wilderness.

Frank and Joe's investigation of the theft of valuable antique weathervanes and their father's search for a missing Navy employee and top secret documents intertwine.

Eight-year-old spy Adam Sharp goes under cover as a Mountie to discover why Ecanem is winning all of Canada's log-rolling contests--and putting the other lumber companies out of business.

Adam Sharp and others of IM-8 go back to spy school to learn the newest tricks, but an enemy spy has infiltrated the top-secret classes.

Eight-year-old superspy Adam Sharp is summoned to cowboy-infested London to find out who stole Big Ben.

Bill and Jack suspect their German neighbor is a Nazi spy.

Eight-year-old spy Adam Sharp pursues the very short Ambassador of Barkastan, who has stolen a top secret computer program, DOGBARK, that will let him understand the language of dogs.

Nate Donovan, along with his friend, Running Fox, become the youngest members of General Washington's spy network when the war comes too close to his Quaker family's home in British-occupied Philadelphia.