The Case of the Phantom Fortune by Erle Stanley Gardner

When businessman Horace Warren hires attorney Perry Mason to investigate threats against his wife, Mason finds himself pulled into a complex web of blackmail, stolen cash, and murder.

As Mason works to uncover the truth, he clashes with both cunning criminal Collister Gideon and headstrong District Attorney Hamilton Burger. To crack the case and reveal Gideon's accomplice, Mason must act quickly while treading carefully around witnesses to ensure their testimony holds up in court. With the future of both his clients and his law practice on the line, Mason employs bold tactics and razor-sharp wit to try to force the real killer out of hiding.