I am new to YUI and I want to learn it from scratch. Can you suggest some books or tutorials? Where should I start? It seems YUI 3 is different from its predecessors. Please help me.
I would start with YUI 3 (most current is the YUI 3.2.0 preview release), but if you go the YUI 2.x route, YUI 2.8: Learning the Library was recently released.