A beautiful island, two curious sisters on summer vacation and a lot of missing bicycles add up to fast paced fun in The Missing Bicycle Mystery: An Adventure on Hilton Head Island. Lori and Vicki Spencer have a talent for getting themselves into interesting situations. While spending the summer with the family at the beach, they and their good friend, Joey, realize bikes are disappearing on the island. They set about to find out who is taking them and why. The kids use their heads and their bikes to do their own investigation and find out more than the police or the bike shop owners know....