This guy seems to be a bit confused about what free will is.
Does he mean to suggest that he was helpless in writing an entire book on the subject of free will? Does he mean to suggest that because I can't alter my own physical needs such as breathing, eating, and sleeping that I am somehow unable to WANT to change them? The article mentions his religious upbringing. I wonder if he would reach the same conclusion if he was raised in a different environment?
My read on it is this: when we construct ideas in our minds we often create shortcuts to help us process new information faster. In everyday life these shortcuts are quite useful. When considering philosophical questions like free will, we need to recognise that those same shortcuts can be harmful to our ability to consider broader possibilities. This person seems to have forgotten that.