Three Cups of Tea: One Man’s Mission to Promote Peace… One School at a Time is Greg Mortenson’s 2007 memoir, coauthored with journalist David O. Relin. It recounts how a failed K2 climb led Mortenson to build schools in remote Pakistan and Afghanistan to promote education and peace, especially for girls. The title refers to a Balti saying about friendship formed over shared tea. Despite winning awards and inspiring many, the book became controversial amid allegations questioning its accuracy and Mortenson’s conduct. The story covers Mortenson’s humanitarian efforts, cultural challenges, personal struggles, and the impact of global politics, ending with ongoing debates over the book’s truthfulness.