Just purchased this book to go with both the Onsite Guide and that notorious Big Red Book (BS7671) which is a nightmare as you will all probably know. So the more information the better in my eyes to help to make sense of this publication. It seems quite well written, with diagrams etc. as what you would expect by the NICIEC boffins. And as far as real interest goes, well we got to get the info from somewhere, the easier the better. Just to sum it up another book to add to my library.