Bhikkhu Cintita, an American monk in the Burmese Sitagu Organization, has recently published (under Creative Commons BY-NC-ND 3.0) an introductory textbook on Buddhism. As far as I know, this is the first of it’s kind.
Buddhist Life / Buddhist Path: the foundations of Buddhist based on earliest sources.
This textbook, bases on the earliest stratum of Buddhist texts, provides a holistic and proportionate account of the range of the Buddha’s Dharma, interpreted for the modern student. We discover in the earliest teachings a corpus that is astonishingly profound and comprehensive, consistent, brilliantly coherent and still intelligible today. Topics include not only the higher training of meditation, psychology and the path to awakening, but also practical advice on virtue, harmony, community and basic human values. This book is divided into two parts, each of which can be studied independently: Buddhist Life concerns living devoutly, virtuously, harmoniously and in community. Buddhist Path, on the higher course of training toward awakening based on the noble eightfold path.
You may find free pdf copies available for viewing or downloading: