Martin, Stan and Jan Berenstein, Richard Scarry, Gilbert Patten or Norman Bridwell (from 400 to 80 titles each) average just 2 million units per title.
The latter is what happens when Alice takes part in an excitement. It's no secret that I still love and crave young adult fiction. https://top100bookmark.com/story18463365/the-confident-child-ten-parenting-tips-for-training-children-to-become-adults