Oliver Twist is a novel by Charles Dickens about an orphan named Oliver Twist. The main characters are Oliver, a boy whose purity remains untouched despite being raised in a corrupt environment; Nancy, a prostitute who commits a noble sacrifice to save Oliver; and Fagin, a Jewish thief who is portrayed through anti-Semitic stereotypes but is a richly drawn villain. Other characters include the kind Mr. Brownlow who helps Oliver, and the hypocritical Mr. Bumble. Major themes are the failure of charity systems, dangers of individualism, and purity surviving corruption. Motifs include mistaken identities, hidden relationships, and surrogate families.