Thought there may be some interest for this as it comes up in here quite often. Roger Musson has just released a new version of what must be the most complete and easy to follow wheelbuilding guide available.
Ok it's £9 and you only get a pdf for that which you'll have to print out if you want a hard copy but I think that's good value for money given the skills it will teach you. I bought mine over 6 years ago and have probably built 10 sets of wheels in that time to it pays back & I still get free updates.
I've no affiliation with Roger or the book I just think it's worth the plug.