While the books recommended so far are fine books, I don't think they're what you want - yet.
You need to start at the very beginning, and be presented with the whole scope of the trade in a systematic manner. Some of the information you need is "code," other is "trade.'
Prentice Hall publishes books on the electrical trade, that are use in the training of apprentices by many established programs. There's a book for each year (4), plus some supplementary materials. These are what you are looking for.
For more details on these books, and how to get them, look at this: http://www.prenhall.com/crafttraining/Catalog.pdf
Details as to the electrical program start on page 24.
Please note there is a slight delay in the availability ... the materials are being updated to reflect the latest edition of the NEC. They might still be willing to sell the older editions; it won't hurt to call and ask!