Sirens! A scary sound, especially to Siria, whose brave pop is a firefighter. Siria loves everyone at Pop's city firehouse. She also loves to study the stars. Her mother named her after the brightest start in the winter sky.      When Siria hears sirens, she sneaks out to chase the trucks, to bring Pop and the other firefighters luck. She'd be in big trouble if she ever got caught. Good thing her best friend, Douglas, is always by her side.   As Christmas approaches, Siria suspects that someone in the neighborhood is setting fires. She has to find out who's doing it. When clues point to a surprising suspect, she realizes that solving this mystery will take all kinds of courage.   Patricia Reilly Giff, the author of many beloved and award-winning books, is at her best in this action-packed story.
