I'd love to begin the year with a book on Rust and another one on being a team manager/lead because I got promoted as a lead (a team of 8) but I totally feel I'm unprepared.
Congratulations on your promotion! Let me recommend the classics: _The Phoenix Project_ and _High Output Management_ by Andy Grove. The latter is from 1983, but the principles are in use in my company today, and it is the start of OKRs, used by Google and others to this day.
Thanks for the suggestions, these books have just been added to my shopping cart. I'm afraid to not have enough experience (5 years) and so I'm trying my best to overcome any lack of experience with study.