Challenger Deep by Neal Shusterman

​Caden Bosch is on a ship that's headed for the deepest point on Earth: Challenger Deep, the southern part of the Marianas Trench. Caden Bosch is a brilliant high school student whose friends are starting to notice his odd behavior. Caden Bosch is designated the ship's artist in residence, to document the journey with images. Caden Bosch is split between his allegiance to the captain and the allure of mutiny