I got this idea while watching Studio 5 (Utah) about a year ago and couldn't wait to try it out. I loved the result!
I have a ton of old books. I chose one that I thought would work well and used a screw driver to drill the hole where I wanted the clock to go. I followed the instructions that came with the actual clock dials and that was it. Easy. I'm sure a drill would have made it even easier. Oh, well.