Suguru (Number Blocks): 500 Medium to Very Hard : (9x9) Puzzles (Logic Puzzles for Adults Series)

Puzzles are fine. The book is in a large format, making bedtime puzzling just a little more difficult. Overall very satisfied.

Have enjoyed many a hour doing this book

There is not any difference in difficulty between the "Medium", "Hard", and "Very Hard" puzzles and none of them are particularly challenging to begin with. I am disappointed as I was expecting something more challenging than the suguru puzzles you find in the newspaper.The puzzles are printed large (4 to an A4 page) and the whole book is well formatted.

It's a nice book, plenty of puzzles, but I wouldn't class any of them as difficult. They only take a few minutes. I subsequently bought the orange Suguru book and that was much more challenging - each puzzle lasted a couple of hours in that one.

Only explains low-level Sudoku. Has nothing to say for harder puzzles.

A good puzzle book to give you a brain workout