I have always found the WROX series pretty good for picking up new stuff, I don't know if they have a JavaScript one, but worth a try.
The other series I tend to look at is the Visual QuickStart series by Peachpit Press.
I think both series are written in easy to understand styles, but they may not be to everyone's taste.
I have the o'reilly JavaScript "The Definitive Guide" (ISBN 1-56592-392-8). Bit heavy, but that is the same for most of their books. However, their pocket references (JavaScript ISBN:1-56592-521-1 & HTML ISBN:1-56592-579-3) are good, well used by me!
Hope that is useful. [sig][/sig]