In book four of Gail Cushman's
Wrinkly Bits
series,
Flash of Time
continues the adventures of Audrey and Logan and thier friends, taking them to Florida where they visit the Haciendas, a large retirement community that caters to every need. The group decides to go to the beach, a nude beach, only to discover that it wasn't (but they were). They, with Lynnie, A teacher from Hunter, Idaho, who had retired a few years earlier decides to dabble in a bit of online dating and sparks begin to fly.