With Hidato's you are given a grid of squares with some numbers already filled in. The idea of the puzzles is to join all the numbers in sequence - as you would expect in each case there is only one unique logical solution.
This is the author's 2nd volume of puzzles, coming quickly after the first.
You get 200 puzzles for your money, gradually the puzzles increase in size and difficulty. There is only a small introductory segment giving advice on strategies to solve the puzzles, but this doesn't matter, you will be able to work out your own.
Just as the first volume, the book is sturdy and has a good, clear lay out.
All in all, both volumes are thoroughly recommended to puzzlers.