Yubotu : Sink the Fleet in These Addictive Battleship Puzzles

Here it is: the next big puzzle sensation, destined to join sudoku and kakuro as a bestselling blockbuster.

Yubotu is the Japanese word for "U-Boat" or submarine, and this collection plays a variation on the traditional favourite know as Battleships.

The object is to locate 10 ships in a fleet all hidden in an "ocean" represented by the spaces in a grid.

An introduction explains all the basics in detail, and the puzzles get more difficult as you go along.