Long-running detective Sexton Blake swings into the 60s here from the pen of W. Howard Baker, who revived Blake in 1956. I posted from a collection of earlier Blake stories here, not that I've got a thing about the character, just vintage detectives, you understand. Howard had a knack for snappy titles, as you can see here. Anyone who calls a story Dark Mambo is all right with me. I've posted the cover to that below, culled from the Net.