Keeping Secrets — Angela Sage Larsen

Book 2 of the series! As if their quest to return home isn't challenging enough for Fifties Chix friends, Mary, Ann, Judy, Maxine, and Bev, they must also cope with a love triangle between Mary, Ann, and James O'Grady; a controversial underground school newspaper; and the unexplained disappearance of their classroom teacher, who may be their only hope to return to 1955. Hang on tight as the time-traveling quintet explodes through well-kept secrets to find the answers.