I didn't read any books on it, got lots of advice instead. I don't recommend the naked method. We tried that and it was a lot of cleanup and not much else. The best method I tried was the 20 min rule. Every 20 min we went to the potty and tried. And I mean on the dot, with a timer, the whole time he was awake. But he was nearly 3, so we fought him to get him on the potty every time, but he was trained in 2 days (not that I was pushing for that since I stay at home with him). We went out in public on day 3 and put on a pull-up, which he wore at home on those days too, and I set my watch a little longer 40 min, so we wouldn't get off track too much. He was asking to go at 30 min without any help from me. No accidents, ever, after that weekend. For poo - we used a sticker chart and candy. The candy was inspiration for the moment and the chart was his choice of a fun trip or activity after every 3-5 successful poos in the potty.
His fav video was "Elmo Goes Potty" and we still sing the song "Accidents Happen" though not for potty accidents anymore! :)