I think that books are just a waste of time while it comes to chess.
[edited] That might have come off wrong. I've read my fair share of chess books but in today's day and age computer software and sites such as this one I would consider much more useful.
I am currently primary working on improving my tactics and calculation skills.
I have browsed briefly in the Art of Attack book. Looks like a great book to improve attacking play, but also calculation!
What do you think?