Book Lockerbooklooker.de was founded in October 1999 by Jens Berthau and Daniel Conrad as a student e-book marketplace. With more than 4.2 million registered customers (as of August 2026),
BookLocker booklooker.deis today one of the largest book markets in German-speaking countries. In recent years, the platform has gradually expanded its services to include audiobooks, movies, music, and games.
