A key issue noted for First appearance of Anissa. Invincible #44 was published by Image Comics on July 1, 2007, as part of a series that began in 2003. Robert Kirkman writes, and art comes from Bill Crabtree and Ryan Ottley. This 32-page issue features Invincible, Atom Eve, Deborah Grayson, Oliver Grayson and William Clockwell, among 8 characters cataloged on VerseDB.