HOLLY HERNANDEZ AND THE DEATH OF DISCO, by Richie Narvaez, won the Agatha Award for Best Children’s/Young Adult Book at last night’s Malice Domestic crime fiction conference. “I am beyond overwhelmed,” says Narvaez. “This book is dedicated to my teachers. A substitute teacher in junior high school lent me a copy of Murder on the Orient Express, which changed my life, and so this is like coming full circle.” Other