The Death Cure (Maze Runner Series)
Love love loved it! The best of the trilogy hands down. I've always enjoyed a dark book and this one really showed the horror of what could happen to civilisation in the event of a widespread disease like the Flare. There were truly heart wrenching moments (one in particular) and I liked the irony of the "good" guys not being good and the "bad" guys actually being good to some extent when all was said and done. A really satisfying ending to an otherwise harrowing tale.
 - James Dashner)