A Goodreads user asked:
Someone can please tell me: did Bateman killed all those people or it was just his twisted immagination? Or maybe he was the son of a succesfull man,who knew of his psycopathic mind and covered all his actions? I'd really don't get it
Elizabeth Ann It's not meant to be understood. The reader is supposed to be left in the dark because the reader is viewing everything from Bateman's perspective - and Bateman himself doesn't even know if it's true or not because he begins to question everything himself. He could have been hallucinating or he could have really done it but just got lucky and escaped. It's open to interpretation. Bateman has no idea so we don't either.