Michaela MacColl has published several historical fiction novels. Prisoners in the Palace received a starred review from School Library Journal and was selected as an Indie Next Choice. Promise the Night received starred reviews and was selected for the ALA Amelia Bloomer List, IRA's Notable Books for a Global Society, and Bank Street College's Best Books of 2012. She has degrees in multi-disciplinary history from Vassar College and Yale University. Rory's Promise is the first in the Hidden Histories series published by Calkins Creek books. She and her family live in Connecticut. michaelamaccoll.com.

Rosemary Nichols has loved history all her life, especially the history of ordinary people. She has two history degrees from the University of Washington and a law degree from the University of Chicago. This is her first book for children. She lives in upstate New York. rosemarygailnichols.com.