Second Horseman Out of Eden

A circus-performer-turned-PI and his ex-cop brother rescue a girl from a doomsday cult in this novel of “terrific suspense” and “unlimited imagination” (Publishers Weekly).
 
With a genius IQ, a past career as a circus acrobat, and a black belt in karate, criminology professor Dr. Robert Frederickson—better known as “Mongo the Magnificent”—has a decidedly unusual background for a private investigator. He also just so happens to be a dwarf.
 
Mongo and his brother, Garth, have left their day jobs as a professor and a cop, respectively, and formed their own PI firm, Frederickson & Frederickson. It’s a great reason to celebrate this holiday season, but when their annual tradition of picking up a few letters to Santa from the post office to fulfill the Christmas wishes of needy children reveals a sinister secret, their cheer is replaced with a yearning for justice. As the brothers race to save a little girl from a religious doomsday cult, they’ll get up close and personal with a murderous zealot bent on the eradication of all mankind—preferably before the New Year . . .
 
Second Horseman Out of Eden is the 7th book in the Mongo Mysteries, but you may enjoy reading the series in any order.