Angels and Demons by Dan Brown
I'm surprised to see I haven't recommended this yet. Especially since I actually enjoyed this book more than what Dan Brown is most known for, The Da Vinci Code. It's more action packed page by page and has a lot more at stake. Robert Langdon is needed to help track down prominent Cardinals that have been kidnapped and are due to be exterminated by the Illuminati, an organization that was long since thought to be gone. Making matters worse is a bomb unlike anyone has ever seen - and it's hidden somewhere in Vatican City. No pressure, right? It's one of those books that's hard to put down, and there are plenty of clues and unique things to follow along as you read and attempt to guess what's going on and what's going to happen next (good luck). In fact, I've been meaning to pick this up again and give it another read.
Notes from the playlist: "Imagine the Fire" by Hans Zimmer