The puzzle pack has 100 interactive puzzles and has the variety of a news stand puzzle book. Sudoku, Wordsearch, Crosswords (American and Quick British) Cryptograms, Codewords, and more.
It's from Oak - the makers of WordSearch for Kindle. It works on K2, K3 and DX and is just 99c
http://www.amazon.com/Puzzle-Pack-1/dp/B0057Q58HW