Changes in Latitudes — Will Hobbs

Trouble In Paradise
Sixteen-year-old Travis is looking for a good time. A vacation in Mexico with his mother, sister, and little brother might cramp his style, but he's willing to take that risk for a chance to cruise the beaches.
Travis soon discovers that even with his headphones and shades, he can't completely cut himself off from his family's problems. He begins to understand why his father didn't come with them: His mother is contemplating a divorce. Meanwhile his younger brother, Teddy, becomes increasingly obsessed with protecting some endangered sea turtles near the resort.
In spite of himself, Travis is drawn into Teddy's efforts to save the turtles. But it takes a devastating tragedy beyond his imagining to shake Travis out of his cynicism -- a tragedy that will change his family forever.