Being Peace by Thich Nhat Hanh

Getting to Where You Are by Steven Harrison

Journey Without Goal by Chogyam Trungpa

I recommend them in this order - I think Journey Without Goal is more approachable after reading the other two. The idea is sort of to start with calming the noise in your head that makes you anxious or upset, then exolore understanding and getting to know yourself, and then after finding some measure of stability work on larger perspectives on your life and your relationship with others.