The Mystic Mullah (Doc Savage) by Kenneth Robeson (Lester Dent)

First published in 1935, the 23rd Doc Savage novel (as originally published – number 9 in the Bantam paperback order) opens with two mysterious strangers from the fabled Asian Kingdom of Tanan arriving in New York City, seeking Doc Savage's aid. They are being hunted by some sort of supernatural “soul slaves” on behalf of an entity known as the Mystic Mullah. They need Doc’s help to save their country.

The Mystic Mullah itself seems to be a mysterious and monstrous floating face which can speak and warn of dire threats. It uses strange ghostly “soul slaves” that look like floating snakes to attack, causing horrible burns or snapping necks. It’s a creepy foe to be sure but we readers know Doc will get to the bottom of it and discover who is behind the mysterious moniker of the Mystic Mullah. Lots of action permeates the novel. We have Doc’s machine pistols, Russian spies, Doc’s skin-bleaching trick, Doc in disguise, and plenty of fisticuffs. All five of Doc’s aides are present for this one, and all of them get captured at one point or another. We also get to see the team travel to Asia and the Kingdom of Tanan. It's always a treat to see them in action in an exotic locale.

Interestingly, pulp writer Richard Sale started ghost writing this novel based on an outline by Lester Dent but removed himself from the project after receiving criticism from Dent. So Lester Dent wrote it himself. Many fans believe, consequently, that Dent worked extra hard on it to make sure it was a good one. Could be. I certainly enjoyed it and would rank it among the top 20 Doc Savage novels.