Ahhh! I finally got my 3.091 Into to Solid State Chemistry textbook. Its a pretty big book so I'll probably break my back trying to carry it on the train each day. In any event the COOP has a few of these left and from what I hear the book will change for next semester. So anyone following the OCW might want to order one before they run out. These are custom books from Wiley, specially for 3.091, so you cant get these at Borders or any chain store... I have no idea how different the book will be next semester but it may be different enough were you cant follow the OCW. The COOP is selling used copies for $84.