More than one of you has asked what the deal is with spiral binding. So, here's the skinny.
I hate it when books don't lay flat. Or workbooks either. So I take them to the office supply store, or a place like Kinkos, and have it spiral bound. As long as it's paperback (don't know if they can do hardback), they cut off the binding and add a spiral.
Super easy and not too spendy. I will say that I've found Staples to be cheaper than Kinkos. That's it!