There is only one bird species that hunts in summer and rears its young in winter: the Emperor Penguin. These extraordinary animals survive the relentless Antarctic climate, braving an average temperature of -49 degrees Celsius, thanks to their special adaptation to the cold, as well as their loving, attentive, and helpful interaction with each other and with their offspring. For this impressive penguin book, award-winning photographer Stefan Christmann, accompanied a penguin colony in Antarctica for 23 months, capturing different stages of their lives. His sensitive images are a beautiful document of penguin behaviour, as well as the rugged, hostile ice landscapes they call home.