sentences:  In September 2013, she released " Starstruck", her first teen science fiction themed novel that is the first of a four-book series.The second book in the series, Starcrossed, was released in late January 2014.Book 3 in the series, "Starbound", was released in June 2014 with Book 4, "Starfall", released in February 2015 as the conclusion to the series.