Buy Individual Puzzles All puzzles are delivered by email, in PUZ and PDF formats (with solution). Puzzle Diminishing Returns for $1.00 Recipient I'm buying this for myself I'm sending this as a gift Please select this option if you would like to use an alternate email address as opposed to your purchase email address. Gift recipient's email Include a personalized note Send at a later date? Send At Buy Now With Please enable JavaScript to continue.
