Usually $2.99 but free for today only.
The last puzzle game I got was extremely addicting. After I was done, I gave my tablet to a friend to play and she played them all in one sitting. Couldn't stop.
This is the HD version, great for tablets. A quick look at the pictures that are included made me get it immediately.
4 levels of complexity: 7x5 (35 pieces), 9x6 (54 pieces), 13x9 (117 pieces), 18x12 (216 pieces) - available for any puzzle.