Welcome to MR, Q
You have been through the forums, so you may already know this, but...
MR has free ebooks that have been beautifully handcrafted by some very dedicated MR members.
ePub format.
Also, free ebook sites..
feedbooks.com and
manybooks.net
Plus, free and for purchase ebook sites ..
smashwords.com and
baen.com Plus Baen has a
free library
You can explore using
Calibre to manage your library of DRM free books. and Kovid, the creator, frequents the forums here. We even have a dedicated
Calibre forum.
Have fun in the forums and ask if you have any questions.
PS Check my signature and click on the links to find more information and links to books by the authors on MR.