Jeremy Greenfield, Contributor 12/30/2013 @ 2:25PM At Digital Book World, we track a weekly list of ebook best-sellers. I’ve counted up how many times each publisher has had a hit and, bingo, an end-of-year ranking of which publishers had the most success publishing ebooks in 2013: 1. Penguin Random House — 478 best-sellers* 2. Hachette