Eco-friendly puzzle enthusiasts will love this new Sudoku puzzle compilation! The Green Book of Sudoku is packaged completely environmentally-friendly and features 200 Sudoku puzzles.
The Green Book of Sudoku is printed on recycled paper and with soy ink – a biodegradable ink. The cover is printed on recycled paper as wall with an aqueous (water-based) coating. The cover has a paper bag-like brown cover and feature a green call-out logo.
Sudoku books sell more than 60,000 copies a week on average and have sold over six million copies the past year.
