Jack Armstrong #3

When a mysterious pirate submarine begins plundering diamond-laden ships off the African coast, authorities turn to Jack Armstrong and Uncle Jim Fairfield, who are developing revolutionary sonar technology to track underwater vessels. Jack devises a daring scheme to infiltrate the operation—but his capture by the ruthless Captain Ubel and the shadowy Countess forces him to walk a razor's edge between cooperation and survival. With Plan X set in motion and only a brief window of opportunity, Jack must outwit the criminals before they strike their next target.

Doug and Max Bentley have become hockey's most dynamic brother act since joining the Chicago Black Hawks in 1939 and 1940, combining their talents to dominate scoring records and earn All-Star status. Their partnership has seen them shatter league benchmarks year after year, with Doug recently tying a thirteen-year-old scoring record and Max earning the Hart Trophy as the league's most valuable player. These two continue to make their mark as one of hockey's fiercest sibling duos.

When a young boy collapses and stops breathing, his mother's desperate cries bring 15-year-old Richard Cunningham rushing from his apartment to help. Armed with his recent Junior First Aid Certificate training, Richard applies artificial respiration in a race against time to save the child's life. This true account celebrates a Minneapolis teenager whose quick thinking and knowledge made all the difference in a life-or-death emergency.

When a jewelry store owner is shot during a holdup, a masked gunman escapes with valuable diamonds—leaving behind only a single, crucial clue. Vic Hardy brings modern forensic science to bear, using microscopic analysis and chemical detection to track the gun's true history and expose the real culprit. It's a tight case where the evidence speaks louder than any suspect's alibi.

Jack Armstrong leads a mapping expedition into the legendary Lost Valley of Ice, a treacherous region where no outsider has returned alive—but when his companions Betty and Uncle Jim's photo-plane is caught in a violent downdraft and vanishes into the valley, Jack and Billy must navigate a pitch-black tunnel and face prehistoric dangers to reach them. What they discover in that hidden tropical paradise is far more sinister than ancient curses: armed criminals with deadly secrets who'll stop at nothing to keep their operation hidden.

Billy Fairfield takes a baby-sitting job watching ten-month-old Irma while her parents are out for the evening, but he's more concerned about missing the football rally where his rival Sam Sneer might win tickets and impress his girlfriend Daisy. When a radio contest unexpectedly offers a chance to win one hundred dollars, Billy finds himself in the middle of a comedy of misadventures that might just turn his night around.