Publishing conglomerates Penguin Random House and Simon & Schuster are facing tough times this quarter as ebook sales fell and total profit dropped 5.6% at S&S and approximately 12% for RPH. The potential culprits? A lack of blockbuster books and low ebook sales. While ebooks sales are still dwarfed by paperback and hardback sales, publishers are now seeing even less revenue from their recently repriced bits. Now that many ebooks are selling well above the $9.99 price that was common early in the Kindle days.