"The Silk Roads: A New World History" by Peter Frankopan isn't specifically about ancient trade. But it is a fantastic world history from a Central Asian and Middle Eastern focus.

He does a great job of pointing out the global forces and trends that tied Asia and Europe together. Most histories look at Central Asia as a wasteland that divided the pre-modern world but Frankopan offers a view of a connected world that created Middle Eastern and Mediterranean empires supported by overland trade. It's no coincidence that the European discovery of sea routes to Asia in the 1400-1500's coincides with the economic decline of the Middle East.