To make a good mystery book, you should mainly focus on how to keep the reader from not wanting to put the book down. If i were to write a mystery book, i would do this by using alot of suspense. Suspense is a apprehension about what is going to happen. Using this would help carry the story into the next chapter so the reader would wonder what is happening next. Anna Argula is an good example of an author who uses suspense in her books. A specific book she wrote that i chose to use as an example of this is called Homicide My Own. This book is stuck between a mystery fiction and detective fiction.