I just got this tip from Kelly. Unfortunately it seems to be out of stock in the UK now and it’s not yet available in the US.

The book written by Carola Zwick, Burkhard Schmitz and Kerstin Kuhl covers the history as well as the most up to date devices and new communication techniques. The book gets into the nature of small screens from a UI and navigational perspective.
April 8th, 2006
It should be available pretty soon from Amazon US. They’re only taking preorders but the US release date says “April”.