Nothing had been the same since Olivia returned home from her adventure above the ocean - not one thing. Olivia missed Billy. Then one day, she gets a note in a bottle. It's from Billy, and he's inviting her to come back for a visit. With Whale's help, Olivia returns to the world above the ocean. Before she knows it, she and Billy are on their way to camp. What adventures await her there? What danger will she encounter? Olivia Goes to Camp is the second book in the Olivia Adventure series.