If you'd prefer a secular angle with some scientific background, Sam Harris's Waking Up is excellent. Reading about Greek Stoicism (Seneca's Letters are a grea

If you'd prefer a secular angle with some scientific background, Sam Harris's Waking Up is excellent. Reading about Greek Stoicism (Seneca's Letters are a great starting point) and Buddhism and comparing their similarities is a great way to get the best out of both. A book that's been sitting on my shelf waiting for me to read it that might also be of interest is Edward Slingerland's Trying Not to Try, which focuses on the Chinese concept of wu wei which has much in common with flow.