As if our recent exploration of the Angry Birds universe didn't convey the franchise's might, here's another sign. A Bad Piggies cookbook is available. Actually, the hardcover, real-life version of Angry Birds: Bad Piggies' Egg Recipes was out for the holiday season last year, long before the Bad Piggies game was ever announced. But now that the game itself is out, Rovio has decided to take the book digital, and so you can now buy the cookbook on the iPad as an interactive app.

For a limited time, the book is debuting at a price of just 99 cents, so grab it quick if you like. Rovio has reached out its Angry Birds claws into yet another merchandising realm -- where to next?