Hades Rising - Losing Latitude by Cory Cramer

When teenager Lilly North survives a shipwreck that claimed the lives of her parents, she seeks to find the cause of the accident in the pages of a mysterious young fugitive’s handwritten journal.

What follows is the story of Buck McGee, an Iowa farm boy who is wanted for his father’s murder. While Lilly heals her wounds in a Naval hospital and mourns the loss of her family, she searches the pages of Buck’s journal for clues as to why a prudent sea captain like her father would have turned their family yacht into an approaching storm.

But as Buck’s story grows more and more bizarre, including accounts of demons, magic and voodoo, and when the government gets word of what Lilly’s father was up to before his unfortunate demise, Lilly will get more answers than she ever bargained for, putting both her—and everyone who comes in contact with her—in grave danger.