Giulio Zambon's Website
Non-fiction - Books and manuals - Cross Number Puzzles
Standard Cross Number Puzzles
by Giulio Zambon

ISBN: 978-1-4826-4596-5
Publisher: MatheMagics Asia
Published in: 2013. Pages: 338.
Available in print from the publisher and from Amazon.

One hundred and fifty 6x6 puzzles suitable for all solvers.

Cross Number is like any normal crossword puzzle. You must solve the clues to be able to write the answers in the grid, like in the example below.