A graphic novel is a type of comic book usually with a long storyline similar to those of novels. The term also encompasses comic short story anthologies, and in some cases bound collections of previously published comic book series (more commonly referred to as trade paperbacks).
Graphic novels are often bound in a better format than the comic magazines, using the same materials and methods as printed books, and are generally sold in bookstores and specialty comic book shops rather than at newsstands.
e.g. The graphic novel Road to Perdition, which became a screenplay and was filmed in 2002, starring Tom Hanks and Jude Law.