​Mark Cohen lives and writes in Denver, Colorado.​Works by this author can be found on Amazon.

I can’t wait for the next book! I really enjoyed this book. It combines my love for mysteries and private investigator novels, with the added fun of werewolves, shapeshifters and other supernatural characters. I would recommend this book to anyone who enjoyed the Trueblood series. It was especially fun because it takes place in Denver.

-Amazon Review of Thaumaturgy



After working for a secret government agency, Solomon “Sol” Klugman went into business as a private investigator. He expected the business to consist of the usual insurance investigations, criminal defense and peeping through the occasional keyhole. But things didn’t work out quite that way. Klugman has a unique skill set unlike that of most other PI’s. A magical/supernatural underworld has been seeping into ours, an underworld in which creatures long thought to exist only in fairy tales or horror movies are all too real. An underworld the government is desperately trying to cover up. For reasons unknown, Klugman has an innate knowledge of and affinity for this “weird” subculture that gives him an edge in dealing with threats from it. When a young witch asks Klugman to help rescue her sister, who has been kidnapped by a criminal syndicate that employs some of the weirds to do its dirty work, he can hardly refuse her. Especially when a mysterious wizard first saves his ass from some dangerous demons, and then assigns him a “helper” in the form of a young woman who’s a shapeshifter–when she’s not working her day job as a veterinarian. Searching for the kidnapped woman with the help of the shapeshifter and a rather grumpy demon, Klugman sets off on a dangerous odyssey through that alternate reality.