Traveling Cat Murder in Nassau

This book is a fictional continuance of the book The Traveling Cat. The book begins the day after the first book ended. Jim, the books fictional character, has just returned from his trip sailing to and from Nassau in his fathers small sailboat. Jim is now entering high school, finds his first girlfriend, and makes the JV football team. Jim soon learns that his friend Johnny, who he met on his trip to Nassau, has just been killed by sharks, but Jim doesn't believe it for a minute. Jim returns to Nassau and finds that before he died, his friend left Jim proof that where Jim had discovered a cannon, there was indeed treasure.