Amazon today announced that it has reached an agreement to acquire digital comics vendor ComiXology for an undisclosed sum. ComiXology developed and distributes the engine used by most major comic book publishers in the United States, including Marvel and DC Comics for their privately branded digital services. David Naggar, Amazon Vice President of Content Acquisition and Independent Publishing said of the acquisition that “we’ve long admired the passion comiXology brings to changing the way we buy and read comics and graphic novels.