The Phantom's Phantom (The Phantom Detective Agency)

The time is 1953. The world has changed. Richard Curtis Van Loan has been forced to hang up his mask. But The Phantom Detective is drawn out of retirement by the sudden murder of his longtime friend, publisher Frank Havens; and must then face the greatest challenge in his long career, as he finds himself pursued and hounded by a vicious, unseen assailant, "The Phantom's Phantom." The hot, sunny hills of Southern California present a very different problem from the cold, dark-edged streets of the Big Apple. As the bodies begin piling up, Van Loan is driven to the very limit of his resources. Who is The Phantom's Phantom?