Spanish Mystery Novels

<p>Hello,
I am a senior who is currently taking IB Spanish 4.
And one of our long term assignments is to find a spanish novel and read it for half a semester.</p>

<p>I want a Spanish Mystery novel that is close to 100 pages (the requirement is at least 100 pages) as possible. I dont have much time on my hands to be reading a 500 page novel. So can you guys please tell me some good Spanish mystery novels?</p>

<p>Thank you! Please Answer FAST!</p>