Marvel Comics - The Untold Story

I've wanted to read Marvel Comics - The Untold Story since its release, but couldn't decide if I would enjoy it enough to justify the price (or its 500+ pages). Although comics in general and Marvel Comics in particular interests me a lot, I am not a big fan of non-fiction books like this. I have yet to finish Bob Dylan's Chronicles, and he's one of my favorite artists! But I received the book as a Christmas present, and so I started reading.