When you get stuck, don't just guess. Think about what is the most efficient way to move forward. How do we identify the best solution method? Consult the diamonds. The numbers in the diamonds indicate what you should work on. For example: if you have a 7 check out Shotguns. If you have a 6 look for a Country Road. If you have a 5 try to find a ZIG ZAG or Scorpion. 43 pages of How To. 240 puzzles with degree of difficulty: Hard to Very Hard. Stop guessing, save time, use the lessons in this book.