Catacomb by Madeleine Roux
I mean, what can I say? Pure genius! I love Madeleine Roux's books. I love the Story of Dan, Abby, and Jordan. They've all grown so much, as characters, over these three books! I love these books because some parts you can predict, but then there are other parts you would never see coming. I know this review is short and sweet, but I truly love this series, and I cannot wait to being reading Escape From Asylum! LOVED IT!!!
Seriously, you need to check out this series!