$20 voucher to Barnes and Noble for only $10 (in-store and online!)

Groupon is offering a $20 voucher to Barnes and Noble for only $10 today.

Go here, click on Chicago under cities, to purchase your $20 Barnes and Noble Voucher for only $10. After purchasing, your voucher will show up under the “My Groupons” section of your account.

This voucher can be used both in-store and online.