I too read many books on Positive Psychology and can highly recommend for you an attempt to unify the field into a cohesive whole: The Good Life: Unifying the

I too read many books on Positive Psychology and can highly recommend for you an attempt to unify the field into a cohesive whole: The Good Life: Unifying the Philosophy and Psychology of Well-Being by Michael Bishop https://www.amazon.com/gp/product/B00YD26TIS/ref=dbs_a_def_rwt_hsch_vapi_tkin_p1_i0 https://www.amazon.com/gp/product/B00YD26TIS/ref=dbs_a_def_r... The author points out how the current field is fragmented with no underlying theory, and he provides one by reconciling the demands of psychologists and philosophers who have thought and written about this topic.