Purchased physical book, looking for digital version as well

Hello,

Is there a digital version of the Learning Python book available to individuals who have purchased the physical copy of the book? I would like to be able to follow along from my computer/PDF as it saves on desk space considerably. I purchased my copy of the book at a local retailer as opposed to the learnpythonthehardway.org web store if it makes a difference. And I do still have the receipt (for some reason) if needed.

Cheers!