I promised that Hidoku puzzles will be back in one form or another… and here they are!
When I published Volume 1 of this book I did say that I was a little worried that I’d overdone the difficulty of the puzzles. And rightly so. Your comments did say that some puzzles were too challenging. Therefore, this time I have reduced the difficulty of the puzzles, but only by a notch. So, if you are new to Hidoku, I recommend trying volume 2 before volume 1!
(click on the cover page to go to lulu and buy!) US $5.95 or £4.24 or €4.61 (PDF e-book)
(payable by PayPal or credit card)
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[…] This is the final book in this set of four: Killer Sudoku compendium, Hitori and Hidoku 2. […]