200 Puzzling Shamrocks
This book is available for download with iBooks on your Mac or iOS device, and with iTunes on your computer. Books can be read with iBooks on your Mac or iOS device.
This book contains two hundred Sudokus that have their initial clues arranged in the shape of
a Shamrock, but you will need more than luck to solve them, because they range from difficult to diabolical.
The difficulty of the puzzles increases as you progress through the book.