Book stacks are one of the you'll find in your town as your walking down the boulevard. You can tap on them to clean up your boulevard.
Why would I clean up?Edit
If you clean up the book stacks you'll earn kibble.
For some quests you need to clean up book stacks.
|Vinnie||Look for books||Find and tap on 15 book stacks||1000 kibble plus 1 bling||2 bling|