Jack Armstrong #5

When Jack Armstrong injures his hand before his charity boxing match against the dangerous Killer Kamm, his friend Billy steps in as a substitute—only to fall victim to Kamm's mysterious knockout power. Suspicious of how easily Kamm dispatches his opponents, Jack challenges the fighter himself and discovers the shocking secret behind the "Killer's" undefeated record, leading to a climactic showdown where brains and determination must overcome a sinister advantage.

Fifteen-year-old Donald L. Smith of Coldwater, Mich., steps into the spotlight after bravely saving eight-year-old Nancy McConnell from drowning, earning the fifth Jack Armstrong Magazine All-American Award for his courage.

Vic Hardy investigates a highway hijacking in which a valuable fur shipment is stolen by two masked gunmen—but the case seems unsolvable until forensic evidence turns the tables. Hardy scrapes skin and blood samples from the victims, collecting physical clues that lead him and Inspector Sheldon to two suspects in Chief Dale's custody. Can science expose the guilty party before the crooks' lawyers set them free?

Jack Armstrong and his friends brave an Arctic blizzard to inspect mining properties in the Yukon, only to find themselves caught up in a murder investigation when a prospector is discovered dead in Ghost Canyon. Constable Randall enlists Jack and Billy to help track down the killer, but as evidence mounts against the obvious suspect, the real culprit may be hiding in plain sight. A tense journey through treacherous snow and a taut investigation will reveal who truly committed the crime.

When Betty Fairfield's purse gets snatched at a department store, she's rescued by policewoman Carol Shaw—and the two quickly become allies. When Carol spots familiar faces casing a jewelry store, Betty races to call for backup while the off-duty officer takes on the suspects Spider Webb and Little Blackie with nothing but her wits and training to stop a heist in progress.

Billy Fairfield's first day with the volunteer fire department goes about as smoothly as you'd expect—chaotic, soaking wet, and hilariously out of control. When a real fire breaks out at the Mayor's house, Billy must actually put his clumsy training to work, though his talent with a fire hose proves to be equal parts disaster and unlikely heroism. A perfect little laugh about learning on the job, 1948 style.