Crime novels with a mystery that the author rewards 10,000 SAR for solving

Novels for sale Crime and mystery with a deep puzzle The author has set a prize of 10,000 SAR for whoever solves the mystery; he is committed to paying it if you solve it. Contact the author through his TikTok or Instagram account; his name is Masoud Hakim I have 10 copies with opened covers but never read, like new They have received high praise and achieved a 5-star rating on the Jarir Bookstore website Each copy was purchased for 75 SAR, invoice available Selling each copy for 65 SAR