John Green’s The Fault in Our Stars was the top-selling e-book in 2014, according to data just released by PubTrack Digital, a unit of Nielsen BookScan. Three other young adult titles were in the top five: Divergent, Insurgent, and Allegiant held the third, fourth, and fifth spots, respectively. Gone Girl, at #2, was the only adult book to crack the top five bestsellers.

Unlike the point-of-sale system used by BookScan to track sales of physical books, PubTrack Digital aggregates e-book unit sales supplied by publishers. According to Nielsen, publishers send data on their confirmed e-book sales made through about 40 major e-book retailers. Nielsen then aggregates the data to develop an e-book sales tracking tool. Participating publishers include more than 30 of the largest trade houses, including all the Big Five. Of the top 25 e-book bestsellers last year, 14 were from Penguin Random House, while HarperCollins and Hachette Book Group each had five. Simon & Schuster placed one e-book on the list. All but two of the top 25 were fiction titles—including adult and juvenile—with two biographies cracking the list: Unbroken and Lone Survivor.

★ Top 20 E-Book Bestsellers, 2014

Rank Title Author Publisher Price
1 The Fault in Our Stars John Green Penguin/Speak $10.99
2 Gone Girl Gillian Flynn Random House $9.99
3 Divergent Veronica Roth HarperCollins/Tegen $9.99
4 Insurgent Veronica Roth HarperCollins/Tegen $13.99
5 Allegiant Veronica Roth HarperCollins/Tegen $15.99
6 The Goldfinch Donna Tartt Hachette $14.99
7 Unbroken Laura Hillenbrand Random House $11.99
8 The Husband’s Secret Liane Moriarty Penguin $12.99
9 If I Stay Gayle Forman Penguin/Speak $9.99
10 Orphan Train Christina Baker Kline HarperCollins $12.99
11 Gray Mountain John Grisham Random House $9.99
12 Big Little Lies Liane Moriarty Penguin $12.99
13 The Maze Runner James Dashner Random House $9.99
14 All the Light We Cannot See Anthony Doerr Simon & Schuster $12.99
15 Outlander Diana Gabaldon Random House $9.99
16 Fifty Shades of Grey E.L. James Random House $9.99
17 The Target David Baldacci Hachette $14.99
18 Sycamore Row John Grisham Random House $9.99
19 Personal Lee Child Random House $12.99
20 Divergent Series Complete Collection Veronica Roth HarperCollins/Tegen