In three cases--a millionaire who writes his own death warrant, a dog who becomes a killer's worst enemy, and an answering service which refuses to talk about a murder--three witnesses hold the solution for detective Rex Stout.

Three witnesses hold all the clues in three crimes of passion that have even Nero Wolfe guessing to the very end. Did the dead millionaire who suddenly came back to life - only to end up dead again - write his own death warrant years before? Will the black Labrador retriever who follows Archie home prove that man's best friend is a killer's worst enemy? And in a case involving a telephone answering service with three very untalkative operators, could the great detective himself be the witness who will save an innocent man from the chair?