I recently bought Kieth Code's Twist of the Wrist books through amazon.com, and thought I would give people my feedback on these. Some disclaimers: First - They are oriented towards the track rider / racer. I am neither, however I have found a lot of the information useful to think about. Second - i do not push my bike even close to it's limits - it can definitely outride me. However, I do try to do things perfectly / properly so that I know if I am ever required to extend beyond my normal riding it won't catch me by surprise and to minimise the likelihood that I will revert to bad (sub-optimal) habits. And yes - some days I do extend beyond my comfort zone to remind me what I (and my bike) can do if necessary. Now for my review: Excellent reading - recommended to all! With my riding experience I would say that I knew 80% of the information that he wrote about and included. About 15% I never thought about, but instinctively knew (but never realised I knew it). 5% made me think "never thought about it that way". So the books are only giving me 5% information gain. However, the benefit of these books is making me think about everything - making me realise what I know, what I don't know, what i actually do, and has made me critique all aspects of my riding whether I am just casually cruising or having a bit of fun. And because I am now doing this I do find myself realising how I can improve further, and extend my skills beyond what I currently have without comprimising my safety to do it. The end.