The Altendieck Inheritance is the first historical novel by Hendrik Lambertus. Armed with a PhD in medieval studies, the author engaged in intensive research for his story. He also has strong connections to the region in northern Germany depicted in the novel and lives with his family near Bremen. Besides his work lecturing at several universities, he also runs a writing workshop.
You can find more information on his homepage at www.hendrik-lambetus.de (German).