In Book One of Sofia's Ellis Island Diary, renowned author Kathryn Lasky tells the story of Sofia Monari's arrival in America from Italy.

When Sofia and her family arrive in Ellis Island after a long and difficult journey from Italy, a cruel twist of fate separates Sofia from her parents and sends her into "quarantine." There, in a state-run hopsital, she and her new friend, Maureen, must learn to overcome the twin hardships of immigration and alienation, while they maintain the hope that they will be reunited with their families.