Bestselling Books Week Ended January 15th.

FICTION

1. "Double Down: Diary of a Wimpy Kid" by Jeff Kinney (Amulet)

2. "The Mistress" by Danielle Steel (Delacorte)

3. "Harry Potter and the Cursed Child Parts One and Two" by J.K. Rowling, Jack Thorne, John Tiffany (Scholastic)

4. "Fantastic Beasts and Where to Find them: The Original Screenplay" by J.K. Rowling (Arthur A. Levine)

5. "The Whistler" by John Grisham (Doubleday)

6. "Tales from a Not-So-Friendly-Frenemy" by Rachel Renee Russell (Aladdin)

7. "Dog Man Unleashed (Dog Man ?2)" by Dav Pilkey (Graphix)

8. "The Underground Railroad" by Colson Whitehead (Doubleday)

9. "Cross the Line" by James Patterson (Little, Brown)

10. "Below the Belt" by Stuart Woods (G.P. Putnam's Sons)

NONFICTION

1. "The Lose Your Belly Diet" by Travis Stork (Ghost Mountain Books)

2. "Food, Health, and Happiness" by Oprah Winfrey (Flatiron Books)

3. "Three Days in January" by Bret Baier and Catherine Whitney (William Morrow)

4. "Hillbilly Elegy" by J.D. Vance (Harper)

5. "Jesus Always" by Sarah Young (Thomas Nelson)

6. "Killing the Rising Sun" by Bill O'Reilly & Martin Dugard (Henry Holt & Co)

7. "The Magnolia Story" by Chip and Joanna Gaines (Thomas Nelson)

8. "The Princess Diarist" by Carrie Fisher (Blue Rider Press)

9. "Tools of Titans" by Timothy Ferriss (Houghton Mifflin Harcourt)

10. "The Whole30" by Melissa & Dallas Hartwig (Houghton Mifflin Harcourt)

FICTION E-BOOKS

1. "Full Package" by Lauren Blakely (Lauren Blakely Books)

2. "What She Knew" by Gilly Macmillan (William Morrow Paperbacks)

3. "The Guernsey Literary and Potato Peel Pie Society" by Mary Ann Shaffer and Annie Barrows (Random House)

4. "Ring of Fire" by Brad Taylor (Dutton)

5. "The Whistler" by John Grisham (Knopf Doubleday)

6. "Small Great Things" by Jodi Picoult (Random House)

7. "While You Were Sleeping" by Kathryn Croft (Bookouture)

8. "A Man Called Ove" by Fredrik Backman (Washington Square Press)

9. "Shelter for Adeline" by Susan Stoker (Stoker Aces Production)

10. "Loving Frank" by Nancy Horan (Random House)

NONFICTION E-BOOKS

1. "Hidden Figures" by Margot Lee Shetterly (HarperCpollins)

2. "The Reason I Jump" by Naoki Higashida (Random House)

3. "Hillbilly Elegy" by J.D. Vance (HarperCollins)

4. "Unsinkable" by Debbie Reynolds and Dorian Hannaway (HarperCollins)

5. "Practical Electronics for Inventors" by Paul Scherz and Simon Monk (McGraw-Hill Education)

6. "An Invisible Thread" by Laura Schroff and Alex Tresniowski (Howard Books)

7. "Wishful Drinking" by Carrie Fisher (Simon & Schuster)

8. "The Lost City of the Monkey God: A True Story" by Douglas Preston (Grand Central Publishing)

9. "Three Days in January" by Bret Baier and Catherine Whitney (William Morrow)

10. "Lady Almina and the Real..." by Fiona Carnarvon (Crown Archetype)

Nielsen BookScan gathers point-of-sale book data from about 16,000 locations across the U.S., representing about 85 per cent of the nation's book sales. Print-book data providers include all major booksellers and Web retailers, and food stores. E-book data providers include all major e-book retailers. Free e-books and those sold for less than 99 cents are excluded. The fiction and nonfiction lists in all formats include both adult and juvenile titles; the business list includes only adult titles. The combined lists track sales by title across all print and e-book formats; audio books are excluded. Refer questions to Michael.Boone(at)wsj.com.

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