You might want to have a look at The Horse, the Wheel, and Language: How Bronze-Age Riders from the Eurasian Steppes Shaped the Modern World. I read it hoping to learn more about P.I.E., and while I did, the focus was a lot more heavily on physical archaeology than linguistic reconstruction. So it might be something akin to the sort of book you're after. It was an interesting read, and I did learn a lot, even if not quite what I was expecting/hoping to.