They have recently come out with an updated edition (2008). It still covers a lot of the same ground but has been updated with current research in neuroscience.

They have recently come out with an updated edition (2008). It still covers a lot of the same ground but has been updated with current research in neuroscience. I would also say this isn't a book that you read once, but rather is something to refer to/re-read again and again as you are working through your procrastination.