"Fifteen-year-old twins John and Ambrose man one of the first submarines in order to transport gunpowder to the patriots and then attempt a prison break to rescue one of their older brothers"--OCLC.
When Revolutionary War patriot Lamberton Clark is shot by the British, he enlists the help of his twin fourteen-year-old sons, John and Ambrose, to get a secret letter to General George Washington.
When eleven-year-old Lou Gibson discovers an old wooden baseball bat in his school's basement, he sets off to determine if the bat's original owner was the school's most famous graduate, Yankee great Lou Gehrig.
