At the Sound of the Beep Author:Marilyn Sachs Mathew and Mathilda Green's parents are splitting up-- and splitting them up. No matter how hard the twins try, they can't convince their parents to let them stay together. Finally, out of desperation, they come up with what seems to be the only answer. — Golden Gate Park doesn't seem like a bad place to live, and the twins become friends with th... more »e other people who call it home. But Mathew and Mathilda can't stay in the park forever...especially not now when, one by one, its homeless are being murdered.« less