I can't for the life of me remember why I hadn't before written a review for OTB.
While the rest of Mill is taken up with restaurants, bars, head shops, and overpriced clothing stores, Old Town Books is a charming call to days gone by, with shelves of vintage books neatly arranged by genre.
Even during the after-hours they have a small collection of books near the door that you can pick from and pay them on the honor system. Their level of trust for other human beings is just so wonderfully antiquated.
Don't expect dollar store prices. OTB deals in quality, not quantity.
It's a pleasant visit whenever I'm near ASU.