If you buy #Kindle #eBooks you DO NOT OWN THEM and they can be REMOVED FROM YOUR LIBRARY ANY TIME #Amazon wants.
Solution: Download your #books, strip the #DRM (don't pirate, tho. Support the authors) and Move them to #Calibre so that you can never lose access to them.
Here's an a good e-reader for #Android:
Reading books with ReadEra
(I heard that in about a week Amazon will remove the ability to download kindle books, so do this fast)
DRM removal tool: Epunor Ultimate (worth the cost. There's a free Calibre plugin, but I haven't been able to get it to work)