If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, withing 24 hours on weekdays.
Customer service
All questions about your order, return and delivery must be sent to our customer service team by e-mail at yourstore@yourdomain.com
Sale & Press
If you are interested in selling our products, need more information about our brand or wish to make a collaboration, please contact us at press@yourdomain.com
Help
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, withing 24 hours on weekdays.
Customer service
All questions about your order, return and delivery must be sent to our customer service team by e-mail at yourstore@yourdomain.com
Sale & Press
If you are interested in selling our products, need more information about our brand or wish to make a collaboration, please contact us at press@yourdomain.com
Join the ranks of the geniuses, and leave behind the merely brilliant! Try to figure out 20 tough types of puzzles like the ones found at international puzzle competitions. These are puzzles that require no verbal skills to solve; you just need your logical brain. How hard can they be? Simple arithmetic and a sharp pencil (with a full eraser) are all you need, plus paying close, close attention. Start by following twisting paths made by worms crawling across triangular grids. Then forecast weather patterns by detecting rain cloud patterns in a numbered diagram. Find lost fleets of ships in grids where only a few different shapes are visible. Rearrange dominoes according to a diagram (problem is, the edges of the tiles have been removed). More fun awaits you with hex loops, skyscrapers, lighthouses, and other suddenly fiendish objects.
⚠️ WARNING (California Proposition 65):
This product may contain chemicals known to the State of California to cause cancer,
birth defects, or other reproductive harm.
For MAP (Minimum Advertised Price) violations and Intellectual Property (IP) or Trademark concerns, please contact:
support@ergodebooks.com
⚠️ California Proposition 65 Warning: Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.