The Macavity Awards are nominated and voted on by members of Mystery Readers International. The winners were announced at Bouchercon, an annual mystery convention which was held in Minneapolis this past weekend. The nominees were published in 2021, so here's your chance to find a great read that my not have a long waiting list.
Best Mystery Novel: Razorblade Tears by S. A. Cosby (MADreads review here)
Best First Mystery: Arsenic and Adobo by Mia Manansala (MADreads review here)
Best Historical Mystery: Clark and Division by Naomi Hirahara (MADreads review here)
For a full list of the nominees, including in the nonfiction and short story categories, take a look here. You can also scan through previous years to find more options.