Original O'Ekaki. Intelligent Designs from Its Creator
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Manufacturer: Vertical
Author: Tetsuya Nishio
Binding: Paperback
Publication Date: 2008-04-22
Publisher: Vertical
Label: Vertical
Number Of Pages: 160
Features for Original O'Ekaki. Intelligent Designs from Its Creator:
Small Picture
Medium Picture
Customer Reviews
Whimsical pictures, good clues, fun hints, bad paper 
2008-09-12
This book of hanje puzzles was great fun. Each puzzle was rated for difficulty...not necessarily related to the size of the grid. The resulting pictures have been pretty interesting.
My only complaint would be the roughness of the paper. I've finally started photocopying the puzzles onto better paper.
I'm pretty good at these kinds of puzzles, but many of the harder puzzles in this book took me several hours to complete--very challenging. For the most part, the resulting pictures were worth it.
Addictive fun! 
2008-08-30
O'Ekaki, also known as hanjie or griddlers are great fun. This book as the previous books by this author is very high quality. The puzzles range from very easy to very difficult. Ratings are given as 1 pencil for easy to 4 pencils for difficult. There are not many 1-2 pencils.Those labelled 3 pencils actually range from fairly easy to quite difficult. Unlike some other books I have bought containing this type of puzzle, the paper is good quality so mistakes can be erased, and I haven't found any errors.
O'ekaki 
2008-06-13
This is probably one of the most fun books of this puzzle out there. I'm addicted to them so have bought quite a few. This would be a good one for both beginners and experienced solvers. It has a nice mix of easy to challenging, and the results are interesting puzzles.
By FAR, one of the best 
2008-05-19
This is by far one of the best pixel puzzles books out there. I can only wish that he would publish monthly instead of annually! The grids are mostly no larger than 30 X 30, with many, many in the 25 X 25 range, and just a few challengers bigger than 30 X 30. The grading of the puzzles from 1-5 are fairly accurate, so you can choose what level you feel like working at and have fun with it. Like all pixels, the smaller puzzles leave a little to be desired in the quality of the picture, but that's to be expected. The larger puzzles turn out pretty nice to beautiful in some cases, and the ones in between are pretty fair representations of some object, not too busy (like the Griddlers).
The only reason I took off one star is for the quality of the paper. It's not as bad as those terrible Griddlers, but it does have some problems. Fortunately, it erases fairly easily, but it also absorbs moisture from the air very easily, so ONLY use this as an indoor book (not recommended for taking to the beach or camping!)