Here are some of the books that are currently best-selling in Germany:
"The School of Magic Rings" by Margit Auer
Charlie Mackesy's Boy, Mole, Fox and Horse
"History of the Bee" by Maja Lunde
Hungry and Full” by Timur Vermes
"The Coffee Shop on the Edge of the World" by John Strelecky.
In addition, the website https://bestsellerbucher.de is also a great source for finding bestsellers in Germany. This site provides information on bestsellers, award nominations, and book reviews. If you want to buy books directly on the website. Hope you find a book you like!