On the night The Buddha died (entered parinirvana), his disciples gathered and he presented a final teaching. This final teaching is included within The Hazy Moon of Enlightenment, along with commentary by Dogen Zenji (the Hachidainingaku from the Shobogenzo - Treasury of the True Dharma Eye).
The essence of the teaching, which is core to all Mahayana practitioners, revolves around "Eight Awarenesses" which are characteristic of all enlightened persons, or buddhas - 1) Having few desires 2) Knowing how to be satisfied 3) Enjoying serenity and tranquility (having a practice of side-stepping the disturbances of worldly life) 4) Exerting meticulous effort 5) Not Forgetting Right Thought 6) Practicing Samadhi 7) Cultivating Wisdom and 8) Avoiding Idle Talk
Dogen's commentary is followed up with other commentaries by Bernie Glassman-Roshi and Taizan Maezumi-Roshi offer their own commentary and question-and-answer sections with Zen students. Approachable and of assistance to those seeking to follow the Way.
Flora Courtois was a college student in Michigan in the 1940s. She describes her path of increasing obsession with understanding what reality is. My favorite line: "Apparently by now, a number of people were becoming concerned about my unusual behavior and someone had made a telephone call." (That led to a knock on the door from student health services and an invitation for a few days' rest in the infirmary.)
It's really fascinating to see her describe--without ever having heard of them--things that Buddhist teachings (and other traditions and mystic accounts) describe, including her experience of finally awakening and the shift in her perception that happened. It was a bit stressful to read about the aftermath and the challenges of being an awakened person where no one shares your experience or had ever heard of Buddhism, but now you have been warned, so go forth and enjoy!