I was a Rat!, Or, The Scarlet Slippers is a whimsical and mysterious children's novel by Philip Pullman. The story begins when a boy, who claims he was a rat before he was a boy, appears on the doorstep of an elderly couple. Named Roger, the boy's strange behavior and wild claims cause confusion and fear, eventually leading him to be chased by the media and a menacing villain. The subplot involving the "Scarlet Slippers" ties into the boy’s identity and destiny, blending fairy tale elements, social commentary, and fantasy in a moving story about belief and belonging.