Three Witnesses (A Nero Wolfe Mystery Book 26)

And Four to Go (A Nero Wolfe Mystery Book 30)

Three Men Out (A Nero Wolfe Mystery Book 23)

Three at Wolfe's Door (A Nero Wolfe Mystery Book 33)

Homicide Trinity (A Nero Wolfe Mystery Book 36)

Plot It Yourself (A Nero Wolfe Mystery Book 32)

The Black Mountain (A Nero Wolfe Mystery Book 24)

Too Many Clients (A Nero Wolfe Mystery Book 34)

Trio for Blunt Instruments (A Nero Wolfe Mystery Book 39)