Does anyone have any recommendations for books about the Nazi projects surrounding UFOs and the occult?

This is a story that has been known for some time, and has made its way into various IPs (Wolfenstein, Hellboy, etc), but I find there is very little information I can find detailing what all they did in relation to these topics. I know about Die Glocke, but little more than the name and concept. I’m curious if anyone knows of any books that have been written on the topic. Most of the allure of the topic is likely just that so little is known about it commonly, so maybe there’s not much to le...