Marc Stevens is a genius.
Part 3 is especially good.
http://www.youtube.com/watch?v=ZL70LQPHiQA
http://www.youtube.com/watch?v=PcVnzaUduZU
http://www.youtube.com/watch?v=xz4bfPc4xJM
( I found his videos after I've heard people talking about his "adventure" book, which they say is brilllant)