Unbroken by Laura Hillenbrand has debuted on Apple’s Top Paid iBooks in the U.S. this week at No. 2. Apple has released its top selling books list for paid books from iBooks in the U.S. for week ending 7/7/14. Invisible by David Ellis & James Patterson and The Silkworm and The Cuckoo’s Calling by Robert Galbraith aka JK Rowling also made the list this week.