Look for changes in behavior.
It could be a sign.
And that's why, last week, when I came home from work and my just-out-of-his-teen-years son had been home alone, I immediately noticed.
Something that I'd last seen tucked away in the basement was on the dining room table.
I pushed aside the thoughts that I might immediately jump to.
But a few days later, I came home and found more evidence. This on the table.
Since the book was left open, I could no longer ignore the obvious evidence.
Tucker is reading again.
No more gorging himself only on Twitter, SnapChat and Instagram.
He may have started with a comic book that he loved as a child, but he has gone on to full-blown novels and even asked if he could have Kurt Vonnegut's Slaughterhouse Five when I was preparing to donate it.
Something's afoot here, and I'm one top of it.