Sanctum by Madeleine Roux
Sanctum is the second book in the Asylum series, and let me tell you that it is just a creepy as Asylum, maybe moreso. Creepy is a good thing.
So we begin with Daniel, or Dan as he prefers to be called. He has been desperately trying to get his friends to contact him more. He feels alone, and has been having nightmares.
One day Dan receives a letter from the mother of the guy who tried to kill him! Seriously, that's messed up. Felix is in a mental ward, and keeps screaming Dan's name, over and over and over! His mother pretty much begs Dan to visit Felix.
He visits Felix, and Felix slips him a picture....well a piece of one. Dan contacts his friends, and it appears they both have a piece of a picture too.
Once they compare pictures, they see that it makes one complete picture. On the back of each piece is a word. When the picture is made whole, it says:
"You're Not Finished"
See, I told you it was awesomely creepy.
Dan, and his friends Jordan and Abby, head back to Brookline to figure out the mystery.
Once they arrive, strange and weird things begin happening just like they did in Asylum.
I urge you to read these books. I love when a book can suck you in, and scare the crap out of you, but keep you interested at the same time. That is exactly what Madelieine Roux does. Such fantastic writing. I cannot wait to read Catacomb.