Sergeant Preston of the Yukon #21

In "The Whispering Raven," Sergeant Preston follows the trail of two express robbers into the frozen wilderness, where he encounters the curious pet raven of local prospector Pop Diston. The bird's sudden, eerie whisper of "trouble" sends Preston and his team on a tense pursuit to uncover the source of the warning. Written by Gaylord Du Bois and illustrated by Alberto Giolitti, this 1956 Dell adventure blends frontier suspense with a touch of the uncanny, all captured in a striking cover by Giolitti.