Found out about this via Rob Caron.

Long-time readers (who am I kidding!) will expect me to be happy about this, as they probably have me down as something of a cheapskate. They'd probably be right about the second bit, but are in fact wrong about the first, as I just bought it :(

Seriously, though, it seems a great book (I was about to post about it anyway) and such references are always handier in paper form - this way though you get to "try before you buy", so I guess it's the best of both worlds...