The folk who develop Prototype & Scriptaculous are mostly Rails users, and the libraries are bundled with Ruby on Rails. Nonetheless, the libraries stand on their own, and can be used with any server-side technology. I'm keen to spread the word outside the Rails community, so we picked a couple of popular languages that we knew well enough - Java and PHP.
However, we felt we needed a good chapter on the Rails integration too, which is where Tom Locke - the man behind the excellent Hobo plugin for Rails - came in.
---<br />Author of...<br />'Ajax in Action' <a href="http://manning.com/crane" target="_blank" rel="nofollow">http://manning.com/crane</a><br />'Prototype & Scriptaculous in Action'<br /><a href="http://manning.com/crane3" target="_blank" rel="nofollow">http://manning.com/crane3</a><br />'Ajax in Practice'<br /><a href="http://manning.com/crane2" target="_blank" rel="nofollow">http://manning.com/crane2</a>