This book contains 100 Japanese Puzzles created by LOGI, the leading Polish puzzle publisher.Inside you will find 100 beautiful puzzles with unique solutions, of five difficulty levels.Size of the puzzles - from 5x5 to 30x35.Japanese puzzles are a kind of very addictive logic puzzles, in which you have to paint some fields following the numbers and you will see that the fields will form an image.Reasons to like Logi puzzles:Each puzzle has only one solution.Puzzles are tested by a computer program designed by Urszula Marciniak, a mathematician and puzzle lover.You can solve puzzles using only logical thinking - no guessing is needed.The program is designed so that it uses only human kind of thinking. So even if a puzzle has only one solution, the program can reject it, because human will not be able to solve such puzzle without guessing and finding contradictions. This is what makes Logi puzzles enjoyable to solve.Puzzles are created by professional graphic designers.We have very high standards for graphics.