Telltale Games is having a sale on a number of their popular games series including Hector Badge of Carnage Puzzle Agent and Monkey Island Tales.
In fact, right now you can grab the first episode of Hector on the iPad and the first episode of Monkey Island Tales for the iPhone and/or iPad for FREE! So you should definitely download these titles and check them out.
Both titles in their fantastic Puzzle Agent series are each only 99¢ as well. So if you are looking for some new adventure games, any of these would be a great (an now inexpensive) choice.