As a fan of online novels, I can't give you any specific recommendations. But if you want to understand philosophy, I can give you some advice. 1 Sophie's World-Jostan Judd This was a very famous philosophical novel about the growth of a young man, covering the main schools of thought and important philosophers in the history of Western philosophy. This book was very influential and was regarded as one of the introductory books in modern philosophy. Being and Time-Martin Heidegger It was a philosophical classic that discussed the nature of existence and the way humans exist. This book had a great influence and was regarded as one of the representative works of modern philosophy and thought. 3. Nietzsche's Philosophy (Philosopher Psychologist Antichlist)-Walter Kaufmann This is a biography of Nietzsche's philosophy, an in-depth exploration of Nietzsche's ideas and influences. This book is very important for understanding modern philosophy and western culture. 4. The Ideology of the State-by Platon This was an ancient philosophical classic that discussed the nature and significance of the state and political system. This book had a far-reaching influence and was considered the foundational work of Western political philosophy. 5. A Discussion on the Origin and Foundation of Inequality Among Men by Jean-Jacques Russell This is a classic book on the philosophy of equality, discussing the concept of equality and how to achieve it. This book was also very influential and was considered one of the representative works of modern equality philosophy. I hope these recommendations will be helpful to you.