The Case of the Mysterious Voicer is the 58th book in the session of Hank the Cowdog by John R. Erickson. This is an interesting session for Hank with lovely stunts and everyday actions. There is a parrot coming to the farm, Hank is not worried. This funny bird chirps around all day, what harm can it do? It can be the mysterious voice to help Hank in his business.