If you would like to purchase multiple titles at once, here's something to consider. For orders of $199.00 or more you can enter the discount code BulkOrders at checkout and a 20% discount will be applied. There is no expiration on this offer.
We have marked down a variety of titles in our store to $29.95, representing 8 different series we publish. See the product group "Sale Items" for a detailed listing.