@rachel31 so Kindle is through Amazon but has an app that links to Amazon & loads the books you have chosen. There are free books & a subscription (there is a cost) called Kindle Unlimited. Kindle Unlimited titles include many books on all aspects of the craft for free. The books you find to order, if they have an e-book you should be able to order it for cheaper than a paperback or hardcover that will get sent right to the Kindle app. Most of my witchy library is through Kindle, but I will always take a physical book over an e-reader any day.
I have found 99.9% of the books 
I have read on witchy topics or histories online. Usually through Amazon honestly to see if they have the Kindle version. Amazon also runs Audible which would be those same books in an audio format (I don’t know about the subscription or free versions). So you have choices & actually reading & learning about what it is you are doing & trying & practicing… is the best thing you can do to move forward with your craft.
Sometimes you can find classes online regarding topics that truly interest you & you want to form a working relationship or practice. There are FREE Astrology Basics courses if that is something you are interested in too.
Always feel free to search the forum though. There is a plethora of topics & information contained within topics & replies.
None of this is bad, I don’t know who is making you feel that way, but they shouldn’t be.
I think I finally figured out what you’re asking & it has come up a couple of times within the forum & we’ve had a challenge that sort of goes with it. A while ago the idea for a Spells8/Infinite Roots Grimoire came up from our friendly witch @phoenix_dawn. Where all the spells we have on the site or the most popular spells written/used by members to be made up into a book for sale. I don’t know what happened with the idea after we had the challenge to list favorite spells or rituals. So that would be a question for @Francisco or @BryWisteria because I’m not sure how far into that idea we had made it. The idea was to make a Grimoire of sorts, although now I think we could add to that list & thicken the book if it’s still in the works. 