The Incredible Adventures of Doc Atlas, by Michael A. Black
Set in the era of the 1940s and 50s, this collection of pulp-style novellas follows the adventures of the mighty Doc Atlas and crew from the jungles of Central America to the frozen tundra of the North Pole. Whether they’re prowling the streets of Manhattan, investigating reports of a killer gorilla (with the purported brain of an executed criminal) or a crashed flying saucer in a small town named Roswell, New Mexico, Doc and company always see the investigation through to the end. Written with historical hindsight, these tales combine the best elements of the pulp era with actual historical figures and events.