I have to be honest, here.  This is the first Steely Dan album I purchased.  Prior to "Two Against Nature," I only had a superficial knowledge of the duo.  But a good album isn't supposed to appeal only to diehard fans. It should also, in some way, conncect to the casual listener so they can find out what the fuss is all about.  "Two Against Nature" is that kind of album.  From the first note, I was hooked: clever arrangements, jazzed-up grooves, offbeat lyrics, and Donald Fagan's distinctive voice, which can never be mistaken for anyone else's.  Unlike other acts half their age, Steely Dan is less concerned with style than substance, and that shows in "Gaslighting Abbey," "What a Shame About Me," and "West of Hollywood."  Fans won't depend on my review to decide whether they should get this album.  But if you only know Steeley Dan as the group that upset Eminem at the Grammys, then you owe it to yourself to get this CD and experience one of the finest acts of the last thirty years.