The Nina, the Pinta, and the Vanishing Treasure (Alec Flint: Super Sleuth)

Alec Flint is a super sleuth-well, maybe he's a super sleuth-in-training. But he has a sweatshirt with a convenient pocket, a cool detective pen that writes upside down, and a handy detective notebook. So, when the Christopher Columbus exhibit goes missing from the local museum, Alec is on the case. With the help of his sleuthing partner, Gina, Alec Flint races to solve the mystery of the missing treasure.