I had the same question. I sent an email to Pocketbook. Below is their answer
Pocketbook products are unfortunately not sold in the USA. However, they are available for order in France to be delivered to the USA
http://boutique.pocketbook.fr/
To get the quote and place the order, send your request at
info@pocketbook.fr in English or French.
In case of ordering the device in France, please mind that the warranty card will be valid for 24 months across Europe only.
Return within 14 days is only possible once you cover the two-way shipping costs.