In 'Fahrenheit 451' by Ray Bradbury how did the firemen know which houses had books?

Citizens sent in alarms stating addresses of places suspected of harboring literature. The alarm is basically faxed to the fire station and the firemen follow the alarm then do what they are hired to do.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.