These are counselling/psychotherapy books that I draw inspiration from:
These are books that may be useful to anyone on a path of self development:
Simple but powerful tools to let go of stress in minutes and gain heart brain coherence
https://www.heartmath.org/resources/heartmath-tools/quick-coherence-technique-for-adults/
Free (or by donation) on-line training in Mindfullness (MBSR)