I...Vampire was a 24 issue series, created by writer J. M. DeMatteis, that appeared in American comic book House of Mystery between 1981 and 1983. It originally started as a backup story among House of Mystery's three story format but soon became so popular that it eventually overtook the title on the cover. Even I...Vampire's finale was almost book length.
J. M. DeMatteis pitched the series to editor Len Wein under the title "Greenberg". Wein liked the concept but rejected the title and suggested "I, Vampire" instead.
In 1591, after being turned into a vampire himself, Lord Andrew Bennett turned his lover, Mary Seward, into a vampire, and she became corrupted by the power. She took the name Mary, Queen of Blood and created a group of vampires called The Blood Red Moon bent on taking over the world. The series followed Bennett into the modern day as he tried to undo his mistake and take down Mary and The Blood Red Moon.