Jonathan Barth

I've found this book to be a pretty well written economic history, informative and a fairly easy book to read as economic histories go. And currently it is available in Kindle format for free from Amazon.

For those that don't have Kindle access, the book is also free as a epub or pdf from Cornell Press:

https://www.cornellpress.cornell.edu/book/9781501755798/the-currency-of-empire/… (plus d'informations)