Ulrich Sonnenberg
Ulrich Sonnenberg has written at least 3 books. Their most popular book is Die Grenze with 1 save with an average rating of 5⭐.
Series
3 primary booksAuthored 67% of series
Dan Sommerdahl
Dan Sommerdahl is a 3-book series with 3 primary works first released in 2007 with contributions by Anna Grue and Ulrich Sonnenberg.
