2021

Place holder until all the lists become available.

This is from Lithub. Sorry to say I’ve not heard of most of these.

1. (Dog Man #10) (1,295,470 copies sold)
2. Mark R. Levin, American Marxism (1,025,638 copies sold)
3. Jeff Kinney, Big Shot (Diary of a Wimpy Kid #16) (985,308 copies sold)
4. Charlie Macksey, The Boy, The Mole, The Fox and the Horse (954,434 copies sold)
5. James Clear, Atomic Habits (894,163 copies sold)
6. Colleen Hoover, It Ends With Us (768,693 copies sold)
7. Eric Carle, The Very Hungry Caterpillar (731,075 copies sold)
8. Dr. Seuss, Oh, the Places You’ll Go! (727,341 copies sold)
9. Don Miguel Ruiz, The Four Agreements (713,696 copies sold)
10. Kristen Hannah, The Four Winds (711,705 copies sold)
11. Adam Silvera, They Both Die at the End (684,982 copies sold)
12. Madeline Miller, The Song of Achilles (652,906 copies sold)
13. Matt Haig, The Midnight Library (652,763 copies sold)
14. Delia Owens, Where the Crawdads Sing (625,599 copies sold)
15. Dav Pilkey, Cat Kid Comic Club (617,821 copies sold)
16. Hepworth/Warnes, I Love You to the Moon and Back (608,498 copies sold)
17. Bessel van der Kolk, The Body Keeps the Score (607,062 copies sold)
18. Jeff Kinney, Rowley Jefferson’s Awesome Friendly Spooky Stories (577,515 copies sold)
19. Taylor Jenkins Reid, The Seven Husbands of Evelyn Hugo (562,002 copies sold)
20. Dav Plikey, Grime and Punishment (Dog Man #9) (557,918 copies sold)
21. Amanda Gorman, The Hill We Climb (551,584 copies sold)
22. Bill Martin Jr., Brown Bear, Brown Bear, What Do You See? (548,592 copies sold)
23. Jeff Kinney, The Deep End (Diary of a Wimpy Kid #15) (543,624 copies sold)
24. Laura Dave, The Last Thing He Told Me (531,404 copies sold)
25. John Grisham, The Judge’s List (517,436 copies sold)

>2 varielle: Many children and teen titles, some just perennial favorites.

I quit The Song of Achilles, but really liked the YA book They Both Die At the End.

I did try to read Where the Crawdads Sing but it was so badly written I couldn’t finish. That didn’t stop the author from making a mint and getting a movie out of it.

I've read all the children's books and Song of Achilles, Where the Crawdad's Sing, and The Four Winds and liked them all. I also read The Seven Husbands of Evelyn Hugo and thought it was trash. I have The Midnight Library on Mt. TBR, but have read several reviews where the fantasy plays a bigger part in the story that I want, so may not attempt that one.

Here is Amazon's best sellers of 2021:
1. Atomic Habits
2. American Marxism
3. The Four Agreements
4. If Animals Kissed Goodnight
5. The Body Keeps the Score: Brain, Mind, and Body in the Healing of Trauma
6. I love you to the Moon and Back
7. It Ends with Us
8. The Boy, the Mole, the Fox, and the Horse
9. The Very Hungry Caterpillar
10. My First Learn-to-Write Workbook: Practice for Kids with Pen Control, Line Tracing, Letters, and More!
11. The Midnight Library
12. The Four Winds
13. Dog Man: Mothering Heights: A Graphic Novel (Dog Man #10): From the Creator of Captain Underpants (10)
14. The Last Thing He Told Me
15. Diary of a Wimpy Kid Big Shot Book 16
16. The Real Anthony Fauci: Bill Gates, Big Pharma, and the Global War on Democracy and Public Health (Children’s Health Defense)
17. The Seven Husbands of Evelyn Hugo
18. The 48 Laws of Power
19. Oh, The Places You'll Go!
20. Brown Bear, Brown Bear, What do you See?

Also, here is a list of about a dozen public libraries most checked out books of 2021 which gives quite a different story: https://www.librarything.com/topic/338501#n7725721

I’ve read The Four Agreements from when it first came out years ago.