Orcas Island mystery
Jan G. Johnson
While spending summer vacation with their grandparents on Orcas Island, Washington, fifteen-year-old Julian and his twin sister try to discover who is behind some unusual petty thefts.

by Franklin W. Dixon (2003)
While vacationing on a tropical island, Frank and Joe Hardy endure "bad luck," face a dangerous typhoon, and struggle to solve a mystery.
Jan G. Johnson
While spending summer vacation with their grandparents on Orcas Island, Washington, fifteen-year-old Julian and his twin sister try to discover who is behind some unusual petty thefts.
David A. Crossman
When they find a map that leads them to explore the site of some long-ago violent events on their Maine island, Bean and Ab find themselves embroiled in a dangerous adventure that includes a terrifying supernatural creature known as the Black Moriah.
James C. Dekker
As Megan digs deeper into her brother's murder, she finds that Danny was "known to police" and that nobody outside of her family cares about solving the crime.
Margi Preus
Francie plunges into her senior year of high school near Minnesota's Enchantment Lake, but when her long-lost brother, Theo, turns up, so does a dead body, and Francie is drawn into another mystery.