If I had to write a book

If I had to write a book it would be a survival story about a boy around14 years old who has ran away from home and hid in an underground cave for a week. When he returns everyone is dead and he is forced to break and steal from shops in order to survive. He appears to be the only person alive….. but he is mistaken. Every night he hears sounds echoing in the distance which may be a sign of people being around. Sounds like an alarm going off or the smashing of a window indicating that somewhere there could be people like him.  One night he hears screams of “No! Don’t hurt me! Nooo!!!!!” and as the scream fades away he realises that who or what is out there could be dangerous and every night the screams get closer and closer.