The ideal gift for Su Doku enthusiasts Posing a greater challenge than standard Su Doku puzzles, this bumper collection of 360 puzzles is for dedicated Su Doku solvers. Selected from the pages of The Times these puzzles will keep even the most eager enthusiasts entertained for hours. Fiendish Su Doku, takes you to the next level. Puzzles in this collection are taken from Times Fiendish Su Doku Books 1, 2 and 3. * from The Times, the No.1 for Su Doku * the more difficult Su Doku books sell best, as dedicated puzzlers look for a supply of puzzles * the Times, as the premium brand, is the market leader in this area.