Tijuana Tanner is a fictional character created by author and illustrator James Warhola. He is the protagonist of the children's book series, Tijuana Tanner and the Mystery of the Missing Moolah. The character is a young Mexican-American boy who lives in a small town in California and solves mysteries with his friends. The acronym SOL, which stands for 'Save Our Lives, ' is a phrase often used by Tijuana Tanner to remind himself and his friends to stay safe and help each other out.