I need a book(s) on building a better mindset and letting go.

I have been really struggling lately with my job and taking things personally and I've seen a few books recommended on building a better mindset such as Can't Hurt Me by David Goggins or Atomic Habits by James Clear and even the Subtle Art of Not Giving a #uck by Mark Manson.

I've have not read these books but I'm curious from the community on a book that helped you with anxiety, mindset and learning to let go, I want to learn to be more bulletproof because lately I feel so fragile and I can't stand it. I get a last minute meeting invite from leadership and my anxiety goes through the roof.

Thanks