Amazon discounts a selection of Dungeons & Dragons Hardcover Rulebooks, with prices as listed below. Plus, Amazon Prime members bag free shipping. The deals: Need the Player's Manual? Walmart offers it for $20.98. Choose in-store pickup to avoid the $5.99 shipping fee. That's the best deal we could find by $6.

Update: Walmart now offers Monster Manual for $22.51 with in-store pickup.