Books Read This Year Sign

My wife found a picture of a sign like this on Facebook and wanted me to design something similar.  I printed her a sloth to go next to the blocks, but you can put anything there if you want.

The shelf does require supports. 

Edit: I added an updated file with more books on top and at 145% scale. The original file was too small, and the single book on top didn't turn out too well. All other errors should be corrected, too.