Based upon a workshop entitled “The Small HSP World” held in Québec 2-5 October 2014. Twenty-five scientists provided chapters for the book. The chapters are from the best scientists currently working in this field. These colleagues include Arrigo, Benesch, Benjamin, Buchner-Haslbeck-Weinkauf, Benndorf, Boelens, Carra, Chang, Currie, Ecroyd, Emanuelsson, Fu, Garrido, Golenhofen, Gusev, Hightower, Kampinga, Lavoie, MacRae, Quinlan, Tanguay, Vierling, Vigh, Weeks and Wu. Briefly, the book starts with the structure of small heat shock proteins, moving to their functions and finishing with their involvement in diseases. Although this is quite broad, the structural aspect will be the unifying theme of the book.