The original and still the best. Getting Things Done is the 'GTD' in GTDInbox, and the book gives you the foundations to really get the most from the software as well as other parts of your life.
The newer of David Allen's books, 'Reading For Anything' is more practical - and more easily digested - than the theory in the original Getting Things Done; giving fresh perspectives and a refined view of the GTD world.
If you use any ProductiveFirefox software then chances are you know of Lifehacker.com, it is a staple of the online productivity world. The title - a 'life hack' is a way of transforming obtuse software or other inefficient tools in your life into highly effective tools for achievement. The book is very practical, and while not designed for the computer novice, everything is accessible.
Tim Ferriss and his book began to create a stir in the tech community in early 2007 following a great introduction at the SXSW Festival in Austin, Texas. The title is a little crass, but it leaves no doubt as to what the book is about: off-loading as much of the mundane aspects of your life as possible, freeing up time for either leisure of success. Praised by CEOs, cubicle workers and the self-employed a like, it went on to be a (well deserved!) 2007 best-seller.
'Your Best Year Yet' is different to other productivity books in that it doesn't prescribe a methodology to be more productive, aiming instead to help you understand your goals and how to achieve them while overcoming your 'limiting paradigms'. It feels like a personal life coach, and sets objectives from the micro (weekly) to the macro (annual).
A little bit of a wild-card in this roundup, Founders at Work is in no way a guide to better productivity. However, it is a fascinating read for anyone in the technical world. Jessica Livingston has managed to draw real insights during her interviews with the people who founded the products that have changed the world (Yahoo, Craigslist, PayPal, Lotus and even Firefox & Gmail). What really stood out is how down to earth everyone was at the start - no amazing powers or insights - just honest hard-work. It's a refreshing - almost inspirational - look at what can be achieved with focus, a lot of effort & a little luck.