The tools of empire: technology and European imperialism in the nineteenth century by Daniel R. Headrick

The tools of empire: technology and European imperialism in the nineteenth century by Daniel R. Headrick discusses the technology that assisted the European nations in creating their overseas empires in the nineteenth century. The book talks about weapons technology, steamships, antimalarial drugs, railways and submarine cables. The book isn't just a listing of technical specifications but also talks about the sociological effects. There's a section on further reading.

Highly recommended!