For something modern, 'The Girl in the Wall' is a good choice. It has unexpected twists and turns that'll keep you on the edge of your seat. The build-up of tension is amazing when you're bored.
I'd recommend mystery novels like 'And Then There Were None'. The suspense will keep you on the edge of your seat and make you forget you were ever bored. Also, biographies like 'Steve Jobs' can be fascinating and inspiring.
The best book to read when bored actually varied from person to person. Different people have different preferences for different types of books. Some people like to read suspense novels, some people like to read science fiction novels, some people like to read martial arts novels. If you want to find a book that suits you, you can first understand your interests and preferences, then choose a novel that interests you and see if there are any works that suit you. You can also try to go to the library or bookstore to see if there are any books you like.
What novel to read when bored was entirely up to personal preference. However, generally speaking, he could try some classic novels such as 'Dream of the Red Chamber',' Romance of the Three Kingdoms','Water Margins' and so on. These novels were all classics of Chinese literature. The content was rich and the plot was complicated. It was refreshing to read.
He could also try some modern novels such as The Ordinary World, Alive, and The Three-Body Problem. These novels all had their own unique styles and characteristics that made people think deeply and inspire.
He could also try some web novels such as Battle Through the Heavens, Martial Refinement Pinnacle, Covering the Sky, and so on. These novels were all published on the Internet, and the novel plots were attractive and enjoyable to read.
In short, the best novel to read when bored was entirely up to personal preference. He could choose a novel that suited him according to his preferences.