Patick OMalley. The Affair of the Blue Pig (1965) 159 pp.
A wealthy woman is murdered in a cabin on a lake in Minnesota. All clues point to Alex Ganzbrook, her innocent summer companion, who seeks help from another summer resident, Andrew Volker. Volker himself is a fugitive, having been framed by his ex-wife for a murder in the Bay Area twelve years earlier. His friends, international secret agents Harrigan and Hoefler, who created a new identity for Volker, agree to help Alex with their formidable network of information and friends in high places. The trail takes them to San Francisco and the Northern California coast in search of the truth and the victims potential enemies. Together they work the evidence in pursuit of the real killer.
Setting: San Francisco, Northern California, Minnesota