Great study guide for home schooling. I would recommend to the publishers though that they perforate the answer pages at the back so they can be removed easily...reduces the chances of kiddies sneaking a look at the back as they work through it :-)
CGP books are just excellent books in general. They are clearly laid out for the pupil to understand in colour and some of them contain the answers. Others may have an additional book to so with it that contains the answers. The illustrations are also good. I would recommend this books.
I use this guide quite extensively in my class, and it works brilliantly; the students find it clear and helpful, and enjoy the way the content is laid out, the questions are challenging enough, the diagrams are simple yet constructive and the material is catered to their syllabus. I got mine through the marketplace for a very reasonable price so am pleased with it, in every way.