I never noticed cell phone towers till someone pointed one out to me. Now, I see them so often that it's almost annoying. They were right in front of me and I was oblivious; now they're everywhere I look. Weird.
That's how it is with the Charles Nelson Reilly sightings. I never knew of his unbelievable ubiquity in pop culture until recently. Now, every time I pick up a book - there he is! I'm almost embarrassed to admit I'd never noticed it before.
Here's a few more books with CNR that I've found recently. It all goes to show: sometimes the hardest things to see are the ones right in front of you.