if you want a reader to access your files, grimmory is the way to go, if you need to edit metadata before doing that or you want to import them to your ereader use calibre if you dont care about them looking nice you can just dump your files in the ereader tho), if you want to automate pirating them, there isn't a very good alternative to something like radarr, but ive been playing with bindery. these are selfhosted, there's also readest for desktop/mobile.