I am presently reading an absolutely superb book by David Eagleman called Incognito:

The book is a popular foray into psychology and neuroscience and synthesises a host of different studies into things brain. I wanted to just bring up a few fascinating studies which cast doubt upon the idea that we have fully fledged, or even remotely authored, conscious free will. It even talks about chicken sexers, which is nice. Rather than produce notes, I have tried to directly link the claims.