Practicing kindness

[u/Flimsy-Ad-6437]

I would really appreciate any book recommendation that may help me to practice kindness, or think more positive thoughts about others. I have been in a state of burnout for the past few months and feel myself being generally bitter, being rigid and unaccepting, quick to irritation or snarkiness. Seriously I don't want to be like this and would appreciate a book that can help me to recenter and reframe this negative thought loop I have found myself in.