The Times Big Book of Ultimate Killer Su Doku: Book 1 (1)

This isn't really a "big book" of Ultimate Killer Sudoku puzzles. It's three small books of 120 puzzles each bound into one cover, each of the three books having its own easy, medium, and difficult puzzles.I don't like the format of the middle book because the number squares are smaller due to dotted lines that take up a lot of space. And I don't like starting over and working my way through dozens of easy puzzles to get to the meat.I especially don't like the fact that there is no cage combination reference section in this book. I rarely use it anymore but, for one or two puzzles in a book, I do like to access it. And if you're going to publish a 360+ page book, include three pages at the back for the cage reference.

Kept my interest. Daily nighttime ritual

Very good value for so many hard Killers. Pity that when bundling the three books together the cage reference pages were left out. These are very useful, shame I did not remove them from my old books before throwing away.

These are the original three books in the series, bundled together.I already bought these separately.Wasted my money!

Keeps the last surviving brain cell in motion. Do try to resist looking up the answers at the back

Convenient size, lots of puzzles for your money. Excellent.

I love very hard Killer Sudoku and I got this book as a present from my daughter.On average I spent 20-30 minutes per Extra Deadly puzzle.It has great puzzles but I would have liked a harder version.