Having looked at what is on offer on Ebay. I notice that the majority consist of the three books by Brian Scaddan, which cover design, inspection and testing and installation. While these books are very good they are only intended as a supplement to BS 7671. The 'BS 7671: Requirements for Electrical Installations' is the true guide to electrical installations. I say guide as these requirements are non statutory.
Having researched this myself a couple of months ago I have found the following books to be the best and clearest guide to understanding domestic wiring. I personally own all of these (as well as the less liked Brian Scaddan books).
BS 7671: Requirements for Electrical Installations
I have no connection with Amazon, or any of the authors. It's just MHO.
Be aware that the BS7671 and Onsite guide are under review and you should try and buy the brown copy (the colour changes every time there is an update). However these changes are minor for the general house basher, and if I were you I would buy the older versions (blue) second-hand as the market will be flooded with people trying to shift them as the new one come out. In about a year or so there will be a change to the three phase colours currently red, yellow and blue to brown, black and grey. Also the lighting ring in houses is about to change take a look at
If you need to know more than the BS7671 tells you then there are seven guidance notes that you can buy: Guidance Note 1: Selection and Erection of Equipment, 4th Edition (IEE Publication) Guidance Note 2: Isolation and Switching, 4th Edition (IEE Publication) Guidance Note 3: Inspection and Testing, 4th Edition (IEE Publication) Guidance Note 4: Protection Against Fire, 4th Edition (IEE Publication) Guidance Note 5: Protection Against Electric Shock, 4th Edition (IEE Publication) Guidance Note 6: Protection Against Overcurrent, 4th Edition (IEE Publication) Guidance Note 7: Special Locations, 2nd Edition (IEE Publication)
Hope this helps.
Regards
Gary