The Blue Envelope

"The Blue Envelope" by Roy J. Snell is a captivating adventure where young Lucile and Marian's summer camping trip in Alaska turns into a thrilling quest. When they rescue a mysterious boy from the ocean, they get swept into a dangerous plot involving stolen boats and suspected kidnappings. The girls become entangled in a web of secrets surrounding the boy's identity and origin as they navigate the untamed wilderness, forming unexpected alliances and uncovering a larger mystery.