SBG--i think the 2-at-a-time socks book by Ms Morgan-Oakes is excellent.. she take about 20 pages
(mostly very clear easy to follow photos--and just a handful of text!) to explain her method--(truthfully i use another method--(easier? harder? well slightly different!) but her method is excellent, and her instructions, well thought out, and well illustrated.
I think that if I were to teach 2 at a time socks on magic loop, i would use /require the purchase of this book!--it has the best directions i have every seen--(and i am picky, and sometimes overly critical!)
It list for $16.95--and i have seen it at chain stores (micheals? no i think it was ACMoore) and you can frequently find 20%/40%/50% coupons for these chain stores --(bringing the price below $15 or even below $10!)
and there are some nice patterns in the book too, (again, i tend to knit my own patterns.. but she has some nice designs)