Secret Scouts and the Lost Leonardo by Mr. and Mrs. Kind is like The Goonies meets The Da Vinci Code, and the incredible book trailer brings the whole story to life:
Tom, Lisa, Sophie, and Jack stumble across the find of a lifetime — Leonardo da Vinci’s codex full of sketches, writings, and calculations. Now they have a choice: do they sell it and become richer beyond their wildest dreams, or do they try to decode the journal and figure out what Leonardo was up to? Tom and Jack want to sell the book, but sisters Lisa and Sophie have other ideas. What they discover within the codex is the science behind time travel. But when they put the calculations to the test, they find out just how dangerous this secret can truly be.