The Art of Atari is currently $21.51 on Amazon, and I can't say if this is the best the price has been for this, but this book is one of the few I would recommend at full price. At the beginning of gaming, a HUGE imagination was key, and the art Atari used still drops my jaw to this day, and this book is all about it.
Sadly, as games got better looking, many developers/publishers used less and less quality box art, as more games could speak for themselves with in game graphics. Art like this, and the same with manuals is now just a lost "art" so to speak, but when it was good, damn, it was truly amazing. The reviews for this book speak for themselves, and at this price, this is a no brainer.