Meaning: Mark Haddon, a renowned novelist, in this quote, highlights the distinction between two types of books and the impact they have on readers. He suggests that while most children may be captivated by a book's storyline or characters, adults are more likely to seek deeper connections with literature that can reveal unknown aspects of themselves.

The first part of the quote addresses the immediate, superficial appeal of a book. Haddon suggests that some books have the power to captivate the reader for a rainy Sunday afternoon – implying that they provide a temporary escape or entertainment. These are the books that can hold the reader "spellbound," suggesting an immersive experience that may be enjoyable but not necessarily profound. For children, who may not have developed a deep understanding of themselves or the world around them, these types of books may offer exactly what they are looking for – a captivating story that provides an escape from reality.

On the other hand, Haddon contrasts this with the type of book that can put adults "in touch with a part of themselves they didn't even know existed." Here, he speaks to the transformative power of literature, suggesting that certain books have the ability to uncover hidden or unexplored aspects of the reader's identity or emotions. This type of book goes beyond mere entertainment; it has the potential to provoke self-reflection, introspection, and personal growth. It can provide a deeper understanding of one's own thoughts, feelings, and experiences, ultimately leading to a more profound and meaningful connection with the material.

Haddon's distinction between these two types of books reflects the idea that literature can serve different purposes for different readers at different stages of their lives. While children may seek entertainment and adventure in books, adults may seek understanding, insight, and self-discovery. This differentiation also speaks to the diverse ways in which literature can impact individuals, offering not only enjoyment but also personal enrichment and emotional resonance.

Moreover, Haddon's quote raises the question of what makes a book capable of revealing unknown aspects of the self. Such books often delve into complex themes, evoke strong emotions, or present characters and situations that resonate deeply with the reader's own experiences. They may challenge the reader's beliefs, expand their perspectives, or confront them with uncomfortable truths. Through these means, the reader is compelled to confront and explore aspects of themselves that they may have previously overlooked or suppressed.

In conclusion, Mark Haddon's quote illuminates the multifaceted nature of literature and its potential to impact readers in profound ways. It underscores the distinction between books that provide momentary escapism and those that facilitate a deeper understanding of oneself. Furthermore, it acknowledges the evolving needs and perceptions of readers as they transition from childhood to adulthood. Ultimately, it encourages a consideration of how literature can serve not only as a source of entertainment but also as a catalyst for personal discovery and self-awareness.