I'm quite happy with the way the book itself is written. I've not read it all yet but it seems to explain and illustrate things well enough. My gripe is that there is no contents page or index. I think every reference book should contain these, and it makes it particularly difficult to navigate for cross-reference and revision purposes when you have the Kindle version as you're working 'blind' so to speak - it's a lot easier to quick-flick through a hard copy to find what you want than it is to flick through page after page of a kindle. I've been trying to build my own contents page of sorts by bookmarking each chapter as I reach it, but this is far from ideal and I'm not sure if this as a kindle book is going to be fit for purpose on any practical level.