Interesting book on this topic: https://www.goodreads.com/book/show/1831667.The_Horse_the_Wh...
This is the right book for a beginner on the bronze age, because it tells you the importance of tin and who was supplying it (and horses) to the large and well-known cities like Mesopotamia. There are a lot of comments today about, "wow, the ancients were more advanced than I thought," but this book will have you understand that steppe pastoralists were much more advanced than you thought.
What would be a good intermediate level book? It's okay if it's academic, doesn't have to be popular science.
Anthony's own update is A Bronze Age Landscape in the Russian Steppes: The Samara Valley Project (2016).
Thanks, I'll take a look at it.