Motor Matt's Submarine; or, The Strange Cruise of the Grampus

"Motor Matt's Submarine; or, The Strange Cruise of the Grampus" by Stanley R. Matthews is an early 20th-century adventure that plunges young readers into the deep sea with Motor Matt, a daring motor enthusiast. Matt and his friends find themselves on a thrilling chase aboard the submarine Grampus, hunting the shady Captain Sixty, whose hidden agenda drives the plot. The story quickly picks up when Matt intercepts a telegram meant for the captain, setting off a chain of mysterious and dangerous events. After being tricked on the Santa Maria, Matt is betrayed and thrown overboard by Sixty, only to be dramatically saved by the Grampus, launching a high-stakes quest for truth and justice in a sea of treachery.