These logic puzzles are designed to boost your brain power and may help in Alzheimer's disease and Dementia. Based on a square grid similar to Sudoku puzzles but using many differing varieties of logic rules. This puzzle book features 7 different varieties of logic puzzles; approximately 48 puzzles in each variety. Instructions are provided for each puzzle type. Each puzzle group starts with easy puzzles slowly increasing in difficulty to medium and to hard puzzles as you get familiar with solving skills. Only the following 7 puzzle types are featured in this logic puzzle book: Total of 336 puzzles to last a long time. As a bonus there are 11 maze puzzles included. All the solutions are provided in the rear. Do not be intimidated, once you get familiar with these puzzles, you will be hooked and will look for more.