Someone at the Door — Richie Tankersley Cusick

BEWARE THE KINDNESS OF STRANGERS

The phone and the radio were dead, but they'd already heard the news: a mass murderer was on the loose. Hannah and her younger sister Meg were miles from the nearest neighbor, trapped in a raging blizzard, home alone. Until the knock at the door. Two strangers burst into the house, wounded, bleeding and nearly frozen. Hannah couldn't just turn Lance and Jonathon away, so she made them promise to leave in the morning. But they stayed, insisting the girls needed protection. Wary of Lance's brooding good looks, Hannah was drawn to Jonathon's reassuring presence. Until the dog, and the axe, disappeared--and the girls wondered "protection from whom?"