Radio Detectives from Pulp Radio. Sparks Media in Grand Rapids, MI serves up a quartet of Hard-boiled gumshoes from the old Pulp magazine days. We begin with Diamonds of Death, by Robert Leslie Bellem. Bellem was known for the grandiose language in his stories, often unintentionally bigger than life. Produced by Michael Packer of Sparks Media and WGVU Public Radio.