...Has a special offer in it for a free $10 gift certificate on a future order when placing a $30+ order. Must write "GIFT ME" in the order comments section of the checkout. Gift cert will automatically be added to your online account after your order is fulfilled. Offer expires on 9/5/11. Fox Chapel Publishing - Craft, Hobby, and Woodworking Books & Magazines!

So... basically, it's good for any books.

The email was sent only to the Fox Sales and Promo list.