TLDR: Kindles just plain do not work with DRMed library books https://www.giga.de/artikel/onleihe-mit-amazon-kindle-nutzen-geht-das/ https://www.giga.de/artike

TLDR: Kindles just plain do not work with DRMed library books https://www.giga.de/artikel/onleihe-mit-amazon-kindle-nutzen-geht-das/ https://www.giga.de/artikel/onleihe-mit-amazon-kindle-nutzen... So the rule of thumb is that Kindles work well with Amazon books and very badly with everything else. Vice versa for non-kindle e-readers