There is a surnames book currently free at Amazon UK
Title: Surnames as a Science By: Robert Ferguson
Get it from Amazon at http://www.amazon.co.uk/Surnames-as-a-Science-ebook/dp/B005UFTAAG/ref=sr_1_2 ?s=books&ie=UTF8&qid=1374301788&sr=1-2&keywords=surnames or http://goo.gl/Qhmwe
I have just downloaded it but haven't looked at it yet. It may be of interest.