The most useful thing about Buddhism, if you are not a Buddhist, is that it spent about 2,500 years doing what Western psychology only started doing in the last century: carefully observing how the mind creates suffering and testing what actually makes it stop. You do not need to believe in rebirth, join a monastery, or adopt a single metaphysical claim to use what it found. The core of the tradition is a practical investigation into why your brain generates so much unnecessary misery, and the findings hold up remarkably well under modern neuroscience. Researchers studying the Default Mode Network, the brain region responsible for that relentless loop of self-referential chatter, have found that experienced meditators show measurably lower activity there, which is essentially what Buddhist teachers have been describing as "quieting the monkey mind" for millennia.
The books on this list are chosen for readers who want the practical psychology without the conversion. They come from different corners of the tradition: a Sri Lankan monk who wrote the clearest meditation manual in English, a Tibetan teacher who turned grief into a practice, an evolutionary psychologist who tested Buddhist claims against lab data, and a Japanese Zen master whose lectures sound more like poetry than instruction. Some of these authors are monastics, some are scientists, and several are Western therapists who noticed that their clinical training and Buddhist psychology kept arriving at the same conclusions through different doors.
You do not need all of these. If you want the science first, start with Wright. If you want the practice, start with Gunaratana or Suzuki. If something in your life has recently fallen apart and you need something that speaks to that directly, start with Chödrön. The tradition is vast, but a single good entry point is all it takes to see what twenty-five centuries of careful attention actually produced.