Best places to find free ebooks

Places I use so that not all of my $$ are spent on ebooks
  1. Public Library
  2. Download the free nook app. Create an account on store website. Search nook books by genre. Arrange findings "Price-low to high". Free ebooks will be shown first.
  3. Download the free kindle app. Create an account on store website. Search kindle books by genre. Sort findings "Price: low to high". Free ebooks will be shown first.
  4. Your child's public school library website.