If you claimed a Numenera or The Strange book from Monte Cook Games through backing Torment: Tides of Numenera, you will need to use the code you received on the Monte Cook Games Store.
To do this:
- Visit the Monte Cook Games Store.
- You need to add the specific product you claimed and add it to your cart.
- Go to checkout, enter your key into the "Coupon Code" field, and then click the "Apply Coupon" button.
- This should reduce the price of the item you selected to $0, and you can continue with the rest of the checkout procedure.
For more help with the Monte Cook Games Store, please refer to their support page.