I only have 'Light' but I believe that they all contain different tricks/routines. Look up the contents online and you'll get an idea of what the contain.
In case you weren't aware, these aren't just condensed versions of the 'Card College' books. The actually written first, but published under a different name (though not in english). They contain mostly self working material but what Mr Giobbi has done (at least in the one I have) is routine them into little sets of three tricks that follow on nicely from each other.