What is Montag trying to hide from his wife in Fahrenheit 451 by Ray Bradbury? What are previous clues that suggest he has done this before?

What is Montag trying to hide from his wife in Fahrenheit 451 by Ray Bradbury? What are previous clues that suggest he has done this before?

What is Montag trying to hide from his wife in Fahrenheit 451 by Ray Bradbury? What are previous clues that suggest he has done this before?
What is Montag trying to hide from his wife in Fahrenheit 451 by Ray Bradbury? What are previous clues that suggest he has done this before?