[see also 2022]
The New York Times: The 10 Best Books of 2021
[see also The 10 Best Books of 2023 • 100 Notable Books of 2023 • The 10 Best Books of 2022 • 100 Notable Books of 2022 • 100 Notable Books of 2021 • The 10 Best Books of 2020 • 100 Notable Books of 2020 • 100 Notable Books of 2019 • The 10 Best Books of 2019 • 10 Best Books of 2018 • 100 Notable Books of 2018 • 100 Notable Books of 2017 • 10 Best Books of 2017 • 10 Best Books of 2016 • 10 Best Books of 2015 • The 10 Best Books of 2014 • The 10 Best Books of 2013 • 100 Notable Books of 2012 • 10 Best Books of 2012 • 100 Notable Books of 2011 • Ten Best Books of 2011]
Fiction
Nonfiction
Kirkus Reviews: Best Fiction Books of 2021, shown here in alphabetical order by author, but on their site Kirkus also lists the books in various groupings, like "Book Club Fiction" and "Fiction in Translation."
[see also Best Nonfiction Books of 2021]