3. On the Trail of the Nerpa

After discovering the stunning truth about Olive’s past during Christmas break, Olive and her roommate Charlie are back at boarding school. Olive’s link to missing astronaut Lenny Popincourt is growing stronger by the day, but he’s still as far away as ever. When Lenny falls into an endless sleep, the girls formulate a rescue plan almost too risky to consider—except they’re the only people on earth who can save him!