I Kill Giants tells the story of Barbara Thorson, an acerbic
fifth-grader so consumed with fantasy that she doesn't just tell people that she
kills giants with an ancient Norse warhammer — she starts to believe it
herself. The reasons for Barbara's troubled behavior are revealed through the
course of the book, as she learns to reconcile her fantasy life with the real
world.

In 2012, I Kill Giants writer Joe Kelley and artist J.M. Ken Niimura
received the International Manga Award, an honor given by the Japanese Foreign
Ministry to an outstanding comic book or graphic novel.