Before the advent of computers, many comic books were hand lettered. These days, comic book letterers use a variety of different computer fonts, depending on the publisher, who's speaking, the tone of the dialog, and the personal preference of the letterer. Some comic books continue to be hand-lettered.The most common "comic book" font seen on PCs is called COMIC SANS.A good resource for this question would be Comic Book Fonts. See link below.