Clutter's Last Stand is an excellent book - it's easy reading, the illustrations are funny, and he makes getting rid of clutter a virtue.
I highly recommend it - if not for oneself, one probably knows someone that has a bit of clutter around.
It's a book I've actually read about three times. (Doesn't mean I've gotten rid of my clutter, but I at least manage to get rid of a car full of stuff every time I read it.)