They won and their book, Märchenmond (English title: "Magic Moon"), was published by Ueberreuter Verlag, soon becoming a bestseller and winning several awards.

[6][2][3] He's also a writer of pulp fiction, including the series Der Hexer (The Warlock), which he conceived in 1984 for the magazine Gespenster-Krimi (Ghost Thriller) published by Bastei Lübbe, mainly based on H. P. Lovecraft's Cthulhu Mythos, and of which he wrote the majority of novels initially under the collective pen name of Robert Craven.

Later the series was reedited and republished as paperbacks, which collected the stories of several pulp magazines, including a prequel, and as e-books both under Hohlbein's own name.

Later he focused more on stand-alone novels as well as some long-running book series, like the Enwor saga or the still not finished Chronik der Unsterblichen (Chronicles of the Immortals).

[2][5][7][3] Apart from his own creations, Hohlbein also wrote various tie-in books for such franchises as Indiana Jones, Stargate and Pirates of the Caribbean.

[7] His work Märchenmond was translated into a theatre play, which has been presented in places like the Westfälisches Landestheater or the Theater für Niedersachsen.

[9][10] The German progressive metal band, Vanden Plas, recorded and consecutively released two full-length albums, Chronicles of the Immortals – Netherworld (Path One) in 2014 and Chronicles of the Immortals – Netherworld II in 2015, that were adapted from Blutnacht, a theater production based on the author's Die Chronik der Unsterblichen.