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