I don't mean to dismiss everything on the shelf but the best source for observation, discussion, and problem solving is right here. You're working in a real-life social sciences laboratory.

The best books for reaching a detached mindset from the problems can be found in classics, biographies, sports, travel...

But if you insist on a title may I suggest, "When Things Fall Apart: Heart Advice for Difficult Times", Pema Chodron.

"My actions are my only true belongings. I cannot escape the consequences of my actions. My actions are the ground upon which I stand." Thich Nhat Hanh