https://archive.org/details/der-sohn-des-zeus-herakles-griechische-mythologie
https://archive.org/details/griechische-mythologie-die-sage-des-odipus
https://archive.org/details/blizzard-in-einer-holzhutte
https://archive.org/details/die-plantage
https://archive.org/details/selbst-denken-harald-welzer
https://archive.org/details/ian-mc-ewan-saturday
https://archive.org/details/khalil-gibran-der-prophet
https://archive.org/details/dr.-heinrich-kusch-prahistorische-unterirdische-gangsysteme