A short intro regarding the purpose of this community.
If you are solely making use of project Gutenberg (gutenberg.org) or use a subscription book reading service, you will probably never face any issues reading your books and finding the exact book that you are looking for.
However, for all people who collect books (physical) or ebooks (digital), you will need to think about how to organize them at some point.
Here comes the Ebook Management community, where we discuss ebooks and how to organize and handle them in the most effective way.
Personally I have tried and used some of the options, but eventually I put my NAS to work. A docker container running Komga (komga.org) is what I am using with great pleasure. Either for books (mostly epub and pdf) as well as comics (cbz).
Let this new community know your struggles regarding ebooks and how you have overcome them. What software, formats you are using and so on.
Welcome!
Just for some perspective, it’s not always about retaining facts and content. Reading a dozen books on a topic can have exponentially better comprehension on a topic than reading the same book a dozen times, even if you can’t remember a single fact from any of the dozens of books. Quality is more important, and exposure to different views will be better over time. Unless you find yourself not getting anything out of a topic in the subsequent books, in which case it may be worth the rereading tact.