Reading David Hey’s article in History Today 2001, Vol 51 (7), is a good place to start. This is a lucid, succinct article which will set the perspective. (Alas, the full online article is now pay-per-view.) Flavia Hodges’s radio talk on Genealogy, Genes and Geography is a broader summary. Also, David Hey’s background notes to the BBC Radio4 series Surnames, Genes and Genealogy. This may be supplemented by the following books: John Titford Searching for surnames David Hey Family Names and Family History and then: Colin Rogers The surname detective George Redmonds Surnames and Genealogy The Writers page attempts to give a flavour of the history of different approaches. If all this enthuses you, then this site’s Bibliography section has masses of further suggestions.