Buddhism: One Teacher, Many Traditions - a book

"In Buddhism, His Holiness the Dalai Lama and American Buddhist nun Thubten Chodron map out the convergence and divergence of the two major Buddhist movements—the Sanskrit traditions of Tibet and East Asia and the Pāli traditions of Sri Lanka and Southeast Asia.

The authors consider Buddhism’s core practices and tenets, such as the four noble truths, the practice of meditation, the cultivation of love, and the meaning of nirvāṇa, and how the traditions sometimes agree and sometimes differ in their interpretations. The authors’ respectful approach illuminates the many ways that all forms of Buddhism, amid their rich diversity, share a common heritage and common goals."

http://www.wisdompubs.org/book/buddhism