Well, actually, 'Heartstopper' is a graphic novel. It has been widely celebrated for its beautiful illustrations and engaging story that follows the lives of its characters, especially in the context of LGBTQ+ youth experiences. The format of a graphic novel allows for a unique blend of visual and written storytelling that has made 'Heartstopper' so beloved.
Well, several factors contribute. Firstly, originality is key. A book that breaks new ground, like 'Neuromancer' which introduced the cyberpunk genre, stands out. Secondly, the ability to make readers think about big ideas such as the future of humanity or the impact of technology. 'The Three - Body Problem' does this well. And thirdly, engaging storytelling. If it can keep readers hooked from start to finish, like 'The Martian' did with its survival story on Mars, it's likely to be considered a top livre.