Futoshiki

Futoshiki or "more or less" or "greater less than" puzzles are not Sudoku, yet they are similar to it. Just as in Sudoku, there are rows and columns, but no "boxes".
Most importantly, there are the inequality symbols between some of the cells in the grid. These symbols tell you which number must be greater and which must be smaller of the two neighboring numbers.
This book contains 200 Futoshiki puzzles in sizes 5x5, 6x6, 7x7, 8x8, 9x9 all the way up to 10x10
At the end there are some gifts for you. What they are is for you to discover and enjoy