I found an inexpensive sukoko pamplet while traveling in Panama. While some of it was in Spanish, most of it was easy for me to understand. Plus it provided some really different types of sukoko puzzels, one's I'd never seen before. So I tried looking for more of the same and came up empty. I thought this would have what I wanted. It had some of the one's in the Panama one, and some new ones. But most just didn't give me what I was looking for. And there was no way to know that ahead of time. These puzzles are pretty hard, so a great challenge for really good players. Me - I'm not so good, so alittle over my ability.