The topic of discussion centers on the criticism and defense of Dan Brown's novels, particularly his most famous work, "The Da Vinci Code." Readers share diverse opinions reflecting their subjective experiences with his writing, acknowledging the trend where popular novels may elicit strong reactions from both fans and critics. Some express feelings of nostalgia and enjoyment from Brown's books, while others criticize their quality and literary merit. The conversation also touches on the nature of 'guilty pleasures' in literature, where personal enjoyment can clash with critical acclaim.