A few years ago I received an email in which they offered me a puzzle book if placed a link to their website. Well I did and a few weeks later I received a slitherlink puzzle book from Nikoli. And to be honest I really liked their Slitherlink puzzles. A long time they sold their puzzle books also online. The only downside is that you can not pay by credit card (you have to use paypal). While browsing their website I also found out that Nikoli makes well made and hand made Sudoku’s. And as they at Nikoli say:
“Can you really say that you enjoy solving this kind of puzzle? I never can. Computer-generated Sudoku puzzles are lacking a vital ingredient that makes puzzles enjoyable – the sense of communication between solver and author. The best Sudoku make you concentrate, but aren’t stressful. They are absorbing, never boring.”
If I look back at the Slithlink puzzle I solved in their book I must agree that I enjoyed each of them. The only thing I have to do now is to wait for snail mail from Japan.