Hey guys, Just wanted to point out this one sudoku site called Sudoku University I found on the RingsWorld web ring. I thought it is kinda of cool that they give a certificate to people who solve sudoku puzzles.
Amazing that you found the same site through RingsWorld almost a year after you first promoted it.
The site charges a lot of money for poor quality Sudoku books. Even the highest level puzzles can be solved without pencilmarks. Several websites publish free puzzles which are a lot more challenging. Sudoku Elementary School would be a more suitable name.