Sinking ships is one of the most famous and popular logic puzzles and it casts a spell on anyone who has ever played it. It is played in combinations at the Sudoku championships, it has a regular place in many magazines and this book gives all addicts the best material for many hours: 200 unique puzzles in four widely varied difficulty levels. Stefan Heine is one of the few renowned and well-known puzzle makers. The book series "Heine's Riddle Library" is constantly being expanded and contains selected quality puzzles of the highest craftsmanship. Meanwhile this series comprises 16 volumes - among others exclusively all puzzles of the great worldwide championships. Of course, each puzzle always has only one possible solution. Unique to this series is the positioning of the respective solutions. You will find them.