This is a really detailed, useful and personal book. It is arranged alphabetically by latin name of plants. The text is peppered with witty remarks and unusual, convincing opinions. It is not suitable for the beginner because it assumes that you know the latin name of plants, and only really works if you already know what plant you are interested in. It is not really a glossy book, although there are colour plates grouped together at several points: instead there is plenty of meaty, thorough text which is also very readable.
If you are keen on gardening this is definitely worth the money, and I think you would find yourself referring to it for many years to come, but be warned: if you pick it up to check one particular plant, it is very difficult to put it down again!