Readers kept Paula Hawkins's Into the Water swimming along at the top of the iBooks bestseller list through May 28, while Margaret Atwood's The Handmaid's Tale dropped to #5. Sandwiched between the two are three thrillers by the usual suspects—Baldacci, Child, and Patterson.

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

1. Into the Water by Paula Hawkins - 9780735211216 - (Penguin Publishing Group)
2. The Fix by David Baldacci - 9781455586554 - (Grand Central Publishing)
3. 16th Seduction by James Patterson & Maxine Paetro - 9780316553452 - (Little, Brown and Company)
4. No Middle Name by Lee Child - 9780399593581 - (Random House Publishing Group)
5. The Handmaid's Tale by Margaret Atwood - 9780547345666 - (Houghton Mifflin Harcourt)
6. Astrophysics for People in a Hurry by Neil de Grasse Tyson - 9780393609400 - (W. W. Norton & Company)
7. Same Beach, Next Year by Dorothea Benton Frank - 9780062390806 - (William Morrow)
8. Lord of Shadows by Cassandra Clare - 9781442468429 - (Margaret K. McElderry Books)
9. Golden Prey by John Sandford - 9780399184581 - (Penguin Publishing Group)
10. Sexy Stranger by Kendall Ryan - No ISBN Available - (Kendall Ryan, LLC)
11. Rich People Problems by Kevin Kwan - 9780385542241 - (Knopf Doubleday Publishing Group)
12. Call the Midwife by Jennifer Worth - 9781101614402 - (Penguin Publishing Group)
13. Dragon Teeth by Michael Crichton - 9780062473370 - (Harper)
14. A Gentleman in Moscow by Amor Towles - 9780399564048 - (Penguin Publishing Group)
15. Everything, Everything by Nicola Yoon - 9780553496666 - (Random House Children's Books)
16. Surrender by Helen Hardt - No ISBN Available - (Waterhouse Press)
17. Four Week Fiance 2 by Helen Cooper & J. S. Cooper - 9781940218557 - (J. S. Cooper)
18. Camino Island by John Grisham - 9780385543057 - (Knopf Doubleday Publishing Group)
19. Wonder by R. J. Palacio - 9780375899881 - (Random House Children's Books)
20. Testimony by Scott Turow - 9781455553525 - (Grand Central Publishing)