The most popular book in Apple's iBooks store this week is former First Lady and Secretary of State, and erstwhile Democratic presidential contender, Hillary Rodham Clinton's tell-all, What Happened, which unseated Stephen King's It for the #1 slot. It hits #2 this week, remaining strong as its second film adaptation continues its theatrical run. Kyle Mills's latest Vince Flynn novel, Enemy of the State, is #3.

iBooks US Bestseller List - 09/17/17 - Paid Books
Rank, Book Title by Author Name, ISBN, Publisher

1. What Happened by Hillary Clinton - 9781501175572 - (Simon & Schuster)
2. It by Stephen King - 9781501141232 - (Scribner)
3. Enemy of the State by Kyle Mills & Vince Flynn - 9781476783543 - (AtriaEmily Bestler Books)
4. Sweet Little Thing by Abbi Glines - No ISBN Available - (Abbi Glines Publishing)
5. Misadventures of a City Girl by Chelle Bliss & Meredith Wild - No ISBN Available - (Waterhouse Press)
6. A Column of Fire by Ken Follett - 9780735224476 - (Penguin Publishing Group)
7. The Girl Who Takes an Eye for an Eye by David Lagercrantz - 9780451494337 - (Knopf Doubleday Publishing Group)
8. Before We Were Yours by Lisa Wingate - 9780425284698 - (Random House Publishing Group)
9. Unbelievable by Katy Tur - 9780062684943 - (Dey Street Books)
10. Secrets in Death by J.D. Robb - 9781250123183 - (St. Martin's Press)
11. A Legacy of Spies by John le Carré - 9780735225121 - (Penguin Publishing Group)
12. Dirty Little Secret by Kendall Ryan - No ISBN Available - (Kendall Ryan)
13. Little Fires Everywhere by Celeste Ng - 9780735224308 - (Penguin Publishing Group)
14. Enigma by Catherine Coulter - 9781501138119 - (Gallery Books)
15. Glass Houses by Louise Penny - 9781466873681 - (St. Martin's Press)
16. Outlander by Diana Gabaldon - 9780440335160 - (Random House Publishing Group)
17. American Assassin by Vince Flynn - 9781439100516 - (Atria Books)
18. Y is for Yesterday by Sue Grafton - 9781101614358 - (Penguin Publishing Group)
19. The Defector by Daniel Silva - 9781101105023 - (Penguin Publishing Group)
20. Seeing Red by Sandra Brown - 9781455572076 - (Grand Central Publishing)