Jack finally receives a coded message from his brother Max, possibly detailing his whereabouts. But duty calls, and Jack is whisked away to the sweltering savan

In The Mystery of the Mona Lisa, Jack is sent to the Louvre Museum in Paris to track down the theft of the world's most beloved painting. He must match wits wit

"The Mona Lisa", the most famous painting in the world, has been stolen from the Louvre Museum in Paris. Can secret agent Jack Stalwart find it before an evil r

The Mona Lisa, the most famous painting in the world, has been stolen from the Louvre museum in Paris. Can Secret Agent Jack Stalwart find it before an evil thi