Oppenheimer==
Hi I'm currently reading ppenheimer's book. It's excellent, he has a comprehensive iblyography and notes, and uses previously published peer reviewed scientific papers. It has a very comprehensive feel to it. I haven't read Sykes book yet, but looking at the appendices and index it doesn't have the sort of comprehensive or academic feel of Oppenheimer's work. Still we can cite both and I suspect there will be many areas of agreement. All the best. Oppenheimer certainly argues strongly for the Iberian origin of most people from the British Isles, though he mentions a paleolithic contribution from the Balkan refuge to England.  

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