Disclaimer: I've never read a book on the history of graphic design before, so I have nothing to compare to.
However, I have read several art history books, and know that they can be quite dry. This wasn't. I didn't read the whole book cover to cover, but rather jumped around, and I enjoyed it. I liked how it grouped the different design/designers by style rather than just following a strict timeline, and I also liked that there seemed to be equal parts text and images, so you could actually see and understand better what the author was talking about. Sometimes you have to flip back and forth between the pages to see the text and the accompanying example, but that didn't really bother me.