I think it's telling that even in a gaming website books "win" over games, silly as the non-comparison might be.
The OP asks which one is "better" at passing time, which is innocuous enough. Time passes anyway. But I submit books work better because you can read anything pretty much anywhere; most games don't have that luxury, and even if you're into portable gaming (I'm not) you can only do it for so long on so much battery life, and it requires a special care that a book doesn't.
I'd also like to point out that reading is something you absolutely have to cultivate. If you don't do it from an early age you're never going to 'get' it. Like how Raiku mentions he can't focus on anything that lingers or doesn't immediately pay off.