Part of the One Color Coloring Book series

Mystery Winter Edition

50 hidden pictures per book that you reveal with just one black pen: every number is a simple pattern, square by square the picture appears. 5 mm squares, one puzzle per page, all solutions at the back.

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How it works

One Color puzzles work with patterns instead of colours: dot, line, cross or filled square, all with one black pen. No colour pencils needed. All One Color Coloring Book books