Signal Me2 books in series
When Jim and Staci Kirk's parents go missing, he decides to search for them himself. Unbeknownst to him, his sister and their best friend, Lou, stow away to join him. It seems so simple on paper, sail from England to the Philippines and find the Kirks. But a hurricane named Erika and a relentless shark conspire against them to make the voyage one of the most perilous trips the teenagers have ever lived. Can they endure the danger? Will they find the Kirks alive or does God have another idea in mind?