The cool book that i just bought today. I was previously working with Prototype and Scriptaculous (and im very good at it) and then jQuery. Most recently i have also worked with mootools because i had to create a component for Joomla 1.5. This week, i had to do something with sliders and had to look into each one of these in more detail. Found out that YUI is far better (and advanced). If you want to sneak peak before purchasing the book, then visit the official YUI blog and read Sample Chapter from Dan Wellmanâ€™s â€œLearning the Yahoo! User Interface Libraryâ€. Note: Post comments and your criticism below.