I just finished
Darwin's Island by Steve Jones. It's a fascinating book and I would highly recommend it for anyone interested in biology.
The Origin of Species is Darwin's best known book but he wrote 18 others on subjects as diverse as insectivorous plants, barnacles, vegetable mould and earthworms, orchids, the expression of emotion, domestic animals and others. Jones' book is a look at these books and the current state of research.
The island referred to in the title is Great Britain where Darwin did most of his studies and never left after returning from the voyage of the Beagle.
http://www.amazon.com/Darwins-Island.../dp/1408700018
Edit: I thought this was available for the Kindle but I was looking at the wrong website and it's only available as an ebook from Amazon.uk.