Help
Find help with free puzzles, game loading, saved progress, and paperback delivery choices. Found a mistake? Note the book title and puzzle number so we can find it quickly.
Yes. All 27 website puzzles—nine each at Easy, Medium, and Hard—are free, and you do not need an account. The paperback books are separate products.
Check your connection and choose Retry if it appears. A new puzzle needs the site files to load. If it still fails, try reloading the page, then send us the details below.
Yes. Progress is stored in this browser on this device. Clearing browser data, using private browsing, or switching devices may remove or separate it. Progress is not synced to an account.
A puzzle that is already loaded can remain playable if the network drops. A first visit or a puzzle that has not loaded still needs the site files, so offline access is not guaranteed.
We have not announced more puzzles or a release date. For now, the site has 27 free puzzles—nine each at Easy, Medium, and Hard.
Move through the grid with the arrow keys. Enter digits with 1–9, use Backspace or Delete to erase, and press N to switch Notes mode. The on-screen controls remain available as well.
On a book page with marketplace options, use Delivering to. Your choice is saved in this browser when storage is available. Amazon confirms the current price, stock, and delivery for your destination. Books without marketplace options do not have a purchase link yet.
Include the book title and printed puzzle number, or the website level and puzzle number. Tell us what looks wrong and use the contact details below.
Do not include passwords, payment details, or other account information.
For order, delivery, or return questions, use the support options in your Amazon order. For website help or book corrections, email support@gridhearth.com.
Errata
No confirmed corrections have been published. If we issue one, it will be listed here by book title and puzzle label.