Byzantium. The surprising life of a medieval empire. Judith Herrin. Allen Lane, an imprint of Penguin. 2007. ISBN 978 0 713 99997 6.

There seems to be a Polish version for which I did not grant permission to use pictures. For a Spanish (not yet out for all I know) and (ISBN978-4-560-08098-6) I was asked and I did grant permission.