This book gives you 365 puzzles from very fresh real games (with a few exception). All puzzles are checked by a computer program so all are correct! These puzzles are all about checkmate. However, not all of them force checkmate but all of them gives you a decisive victory, exactly like in your real games! Puzzles are divided into 5 groups depending on their difficulty. And this devision is perfectly done. I mean level 2 is definately more difficult than level 1 and so on. The book has an additional test at the end which can roughly estimate your ELO. This book has both answers and hints. Terribly convenient book!
Well, all above give this book 4 starts or 5 starts. However, there is something outstanding about this book that gives it 6 starts if it would be possible. Every puzzle is commented by Joe Galagher who is an amazing author with very nice sence of humor. Every puzzle diagram is commented by a paragraph or two with a brief history of every game where that position appeared. Even more! Every hint and every solution in this book is commented as well.
Now, I can tell you how difficult the problems are. I have about 1700+ USCF rating and the first level make me sweat but I solved correctly all problems finally (without chessboard). The level 2 was pretty hard and not all puzzles I could solve quickly or correctly. However, after resolution of all level 1, the level 2 was not as difficult. Some problems of the level 3 is not too hard either but some problems I could not solve even after a hint or using a chessboard.
I really improved. Now I play sharper and i believe that my next tournament will be much more successful. Excellent book and outstanding work by Joe Galagher.
Well, i can tell you that i do not like how this book is printed though. The quality of print is average. Such a great job could be printed a little bit better. However, the quality is acceptable though not the best possible.