I think it is available electronically from safari.net
(or is that safari.oreilly.com?). So I hear, I have
never used that service.
You can get it off safari.oreilly.com or safari.informit.com, bascailly
they are all portals to the same site.
It will cost (a minimum) of $9.99 a month to have 5 books a month
available to you. There is a 14 day trail, so you can get a feel for the
service though.
Its where I found The Ruby Way, read it, created my own copy and then I
bought it. (from Amazon.co.uk though)
Rob