19-year-old boys were suitable for reading all kinds of novels, but the most important thing was to choose the books that suited them to satisfy their reading interests and needs. Here are some books and recommendations that might be suitable for 19-year-old boys: 1. Fantasy novels such as " Battle Through the Heavens " and " Martial Universe " usually involved cultivation, combat, magic, and other elements to cultivate the reader's thinking ability, imagination, and physical fitness. 2. Youth literature: For example, To Our Lost Youth and Hello to the Old Days. These novels usually describe the growth, emotions, and life experiences of puberty, allowing readers to feel the beauty and preciousness of youth. 3. Science fiction novels such as " The Three-Body Problem " and " The Wandering Earth " usually involved elements such as technology, the universe, and the future to stimulate readers 'curiosity and thirst for knowledge. 4. Historical novels such as Records of the Historian and Those Things in the Ming Dynasty usually involve historical, character, and cultural elements to cultivate the reader's historical awareness and cultural literacy. 5. Suspense novels such as Sherlock Holmes and Ghost Blows Out the Light usually involve detective, suspense, horror and other elements to cultivate the reader's logical thinking and reasoning ability. Of course, this was just a recommendation. The readers could choose books that suited their interests and preferences. At the same time, he also had to pay attention to controlling the reading time to maintain his physical and mental health.