I've tried a few books on solving the cube. Most are really basic, and not very clear. This book covers the basic method very well, and also explains why the method works as it goes along (at least I assume it's clear. I may have the advantage of already knowing what it means).
The only issue I have is a technical one: since I would like to read the speedcubing solutions whilst actually holding a Rubik's cube, the book would be massively improved with a ring-binder spine. That way I could actually put the book down without losing my place! This is a failing of most instruction manuals of course, but the first publisher to sort this issue would get my money.
Update: After six months I have now used this book to learn the speedcubing technique, and without much hassle at all. Very clear instructions again, and I can now use the CFOP method to solve the cube in well under a minute! (49.9 seconds is now my average - I know: more work still to be done). I still had problems with keeping the book open whilst I read, but I got around this by photocopying the pages and laying them out on the table in front of me, with the added advantage of being able to arrange the solutions in any order I needed. Very good book, and I'm still not finished with it yet. There are even more advanced techniques I still haven't got to.