This document discusses reader response theory, which focuses on how readers actively make meaning from texts based on their own backgrounds and experiences. It provides definitions and history of the theory, explaining how readers construct meaning through being "ideal readers" or "implied readers" by filling in gaps. The document also discusses interpretive communities of readers, the role of readers and literature, and advantages of the reader response approach. It concludes by briefly summarizing the plot of the Harry Potter stories to provide an example.