Scott McCloud’s book Understanding Comics is ostensibly a book about comic books as an art form, including its history, evolution, and modern structure.
The author has much love for comics and fell in love with them as a child. I can partially relate in that when I was younger I looked forward to the Sunday newspaper and reading the comics. However, I never had an affinity for comic books and found them to be a waste of time. These days I only read Dilbert on a regular basis.