England's most highly placed agent is abducted by West German police. They plan to trade him to the Soviets in exchange for one of their own operatives. Into this explosive climate steps Therrick, a mysterious loner, just the free-lance agent to call when there's some dirty work to be done.

Exchange of Clowns 1988, Collier Books

ISBN-13: 9780020383116

Collier Books edition

Trade paperback

Exchange of Clowns 1981, Little Brown and Company

ISBN-13: 9780316940511

American edition

Unknown binding