The latest version is 0.6.9 and comes in the following flavors:
As Ruby is an interpreted programming language, the deb file actually includes all of the source code, but the source package is closer to the form the developers use to work with the code.
User of Debian-based systems, including Ubuntu, may find it easier to install Alexandria from the Alexandria PPA which also includes libmarc-ruby for Z39.50 support. Up-to-date development builds will be distributed to the PPA to facilitate quicker testing of bugfixes.
To keep up to date with the very latest version of Alexandria, you can check out the current subversion (svn) repository: svn checkout svn://rubyforge.org/var/svn/alexandria/trunk/alexandria alexandria There are further instructions for working with subversion at RubyForge.