The Noble Eightfold Path The Way to the End of Suffering by Bhikkhu Bodhi

Dukkha, its origin, its cessation, and the way to its cessation-these are the Four Noble Truths, the "elephant's footprint" that contains within itself all the essential teachings of the Buddha. It might be risky to say that any one truth is more important than the others. since they all hang together in a very close integral unit.

But if we were to single out one truth as the key to the whole Dhamma it would be the Fourth Noble Truths, the truth of the way, the way to the end of Dukkha.

That is the Noble Eightfold Path, the path made up of the following eight factors divided into three larger groups:

quoted from Beyond the Net: the Noble Eightfold Path website

The Noble Eighfold Path

The Noble Eightfold Path: Way to the End of Suffering by Bhikkhu Bodhi

Eight Fold Path (pdf format)

Eight Fold Path (pdf format)