Geekitude
A couple of years ago I gave my dad a copy of Quantum Physics, Chaos Theory, and Cosmology by Miko Namiki, Ichiro Ohba, and Kei-Chi Maeda. When we had dinner together last week he mentioned that he had finally started reading it. Turns out, the part of the book he's on right now closely parallels an article I read recently about how time works. Cool.