Paula Hawkins’s blockbuster debut, The Girl on the Train, led overall e-book sales for the first quarter of the year, from January to March. The book, released January 13, landed one spot above E.L. James’s Fifty Shades of Grey, and Chris Kyle’s memoir, American Sniper (adapted into a film of the same name), hit #3. The 2015 Pulitzer Prize winner for fiction, All the Light We Cannot See by Anthony Doerr, came in at #4.

The sales figures and ranking come from PubTrack Digital, a publisher-aggregated e-book-sales tool in which publishers supply confirmed e-book unit sales to Nielsen every month. More than 30 publishers supply figures; free e-books and books sold for less than 99¢ are excluded.

The titles in Veronica Roth’s Divergent trilogy claimed the top three spots on the juvenile e-book list (not shown), with Insurgent, Divergent, and Allegiant hitting #1, #2, and #3, respectively. The eponymous first book in James Dashner’s Maze Runner series hit #4, and the second book, The Scorch Trials, rounded out the top five for young/adult children’s sales.

Top 25 E-Book Bestsellers, First Quarter 2015

1 The Girl on the Train Paula Hawkins Penguin $12.99
2 Fifty Shades of Grey E.L. James Random House $9.99
3 American Sniper Chris Kyle HarperCollins $21.99
4 All the Light We Cannot See Anthony Doerr Simon & Schuster $13.99
5 Fifty Shades Darker E.L. James Random House $9.99
6 Big Little Lies Liane Moriarty Penguin $12.99
7 Gone Girl Gillian Flynn Random House $9.99
8 Unbroken Laura Hillenbrand Random House $11.99
9 Fifty Shades Freed E.L. James Random House $9.99
10 Private Vegas James Patterson Hachette $14.99
11 Fifty Shades Trilogy Bundle E.L. James Random House $29.99
12 The Nightingale Kristin Hannah Macmillan $8.99
13 The Escape David Baldacci Hachette $14.99
14 Still Alice Lisa Genova Simon & Schuster $7.99
15 Wild Cheryl Strayed Random House $10.99
16 Dark Places Gillian Flynn Random House $9.99
17 The Boy in the Boat Daniel James Brown Penguin $9.99
18 To Kill a Mockingbird Harper Lee HarperCollins $12.99
19 The Longest Ride Nicholas Sparks Hachette $12.99
20 Grey Mountain John Grisham Random House $9.99
21 A Spool of Blue Thread Anne Tyler Random House $12.99
22 Obsession in Death J.D. Robb Penguin $13.99
23 Insurgent Veronica Roth HarperCollins $13.99
24 Divergent Veronica Roth HarperCollins $9.99
25 Allegiant Veronica Roth HarperCollins $15.99