https://libbyapp.com/library/halifax/spotlight-51/audience-2/page-1
https://www.ebooksgratuits.com/
Project Gutenberg-- not really the ideal set up but does have French books that can be read online.
http://www.gutenberg.org/ebooks/13765
http://www.gutenberg.org/browse/languages/fr
French Speaking digital library
https://ebooks-bnr.com/par/auteurs/
Quebec ebooks --
http://beq.ebooksgratuits.com/