American writer of children's literature and young adult fiction. Her popular titles include The Perfect Shot, Ghost Soldier, and the Edgar Award-winning Counterfeit Son.
One of her early works, Ghost Cadet, received a Virginia State Reading Association Award.
Several of her young adult novels, including Simon Says and Picture Perfect, feature homosexual protagonists.
She co-wrote several biographies with her military historian husband Arthur Alphin.
One of her novels, Tournament of Time, features the ghosts of two princes murdered by King Richard III.