At this price, the book, full of interesting text and some excellent reproductions (a number of paintings don't lend themselves to reproduction, alas), is a steal. If you have any interest at all in Abstract Expressionism (those less familiar can read my above-linked entry for a sense of what goes on within all those spatters and squiggles), you must own this book.
If you make it to the show, don't miss Joan Mitchell's devastatingly beautiful painting on the second floor. I like her as much as I do Milton Resnick. Look for the luscious, erotic, ecstatic blur of indigo just above center. It may be my single favorite brushstroke of all time.