I did this exact thing. The only thing I would like to add is that you want to buy both shelves at the same time. I bought the first book shelf because it was the only one they had, so we went back a few days later for the second one. Well, because they came from from different manufactured lots (I am quessing) they are off a 1/4 to 1/2 of an inch.
They still look really nice though, way better than out on a table stacked like I had them
.
I am also using a heat cable bought from petsmart, instead of heat tape.