http://www.nikhilk.net/Project.ScriptSharp.aspx
Script# is a very interesting side project by Nikhil Kothari that uses C# for client scripting; a compiler generates JavaScript instead of MSIL
JavaScript: The Definitive Guide by David Flanagan (O'Reilly)
A complete programmer's guide and reference manual for the JavaScript language
JavaScript Pocket Reference by David Flanagan (O'Reilly)
A concise but thorough overview of the language
