Flowers for Algernon by Daniel Keyes

The provided text comprises progress reports written by Charlie Gordon, a man with a low IQ who undergoes an experimental surgery to increase his intelligence. Initially, his reports are riddled with misspellings and grammatical errors, reflecting his intellectual limitations. As the experiment progresses, Charlie's writing improves dramatically, showcasing his rapid intellectual growth and his ability to comprehend complex concepts and recollect repressed childhood memories. However, this newfound intelligence brings social isolation and a realization of how he was previously treated. Eventually, he begins to regress, his intelligence and cognitive abilities deteriorating, returning him to his former state of intellectual disability, while retaining some self-awareness and empathy for others like him.