I've subscribed for Sudoku Grand Masters for several years now and plan to continue as it's a perfect puzzle book for me. In the early days I could enter the £500 monthly competition on line but that has not been available for several years which is disappointing as it is still showing as an option on the competition puzzle page??? The subscription is 13 magazines per year which to me is 1 every 28 days but they don't arrive with that regularity, it seems almost every 30 days? Finally, can we have more killer sudoku instead of the 16 out of 120 puzzles? Peter