Book excerpt: Luke Nguyen, of 'Secrets of the Red Lantern' fame, is going home. Travelling on a personal and culinary tour through Vietnam, Luke visits his family and friends, and is invited into the homes of local Vietnamese food experts and cooks, to learn more about one of the richest, most diverse cuisines in the world. Starting in the northwest of Vietnam, in the villages and hills around Sapa, Luke explores the roots of traditional cooking. Moving south, he travels to the capital, Hanoi, renowned for its French-Vietnamese cuisine. He explores the imperial cooking of Hue, discovers the famed cau lau noodles in Hoi An, and tastes a host of simple seafood dishes of coastal Nha Trang and Quy Nhon, his journey culminating in Saigon, where he is reunited with family. 'The Songs of Sapa' is a vibrant, visual essay of Luke's journey, the stories and recipes from each region, with stunning photographs bursting with colour and texture, capturing the beauty of Vietnam, her people and their deep connection to food.