Which mystery novels are suitable for a 12-year-old girl to read?

The content of the novel had to be healthy and not too scary.

Answer 1

I recommend you to read the novel,"Catching the Murderer Through the Book." The protagonist is 12 years old like you, and the story background is very interesting. She transmigrated into a mystery novel to track down the murderer. This book is also a mystery detective novel, very suitable for young girls who like to speculate. I hope you like my recommendation. Muah ~