"Every year we're blown away by the consistently amazing book releases in the genres of science fiction, fantasy, young adult, and beyond—and 2021 raised the bar even further. Our reviewers each picked their top contenders for the best books of the year, ranging from hopepunk to fantasy romance, and alternate history to gothic horror."
I've included all mentioned novels and novellas, but not short stories as they don't typically have cover art.
https://www.tor.com/2021/12/07/tor-com-reviewers-choice-the-best-books-of-2021/
