That's a very good price Chris, although it's a relatively recent book you don't see too many about.
Let me know if your not going for it and I'll have a punt at it.
My Early Man cost me £60, I probably paid over the odds at the time but it was money well spent from my perspective.
I picked up the Archaeology of Yorkshire reprint for buttons off e-bay.
If you want to discuss anything off-forum I'm at hotmail dot com.

good luck
fitz