This will be brief, unlike many other site policies.
This website doesn't track your movements online, and it never ever will. Ever. Tracking is not cool.
This website also doesn't collect any personal data, but does collect some general site stats via Google Analytics, like the number of people who have visited, their operating system, and how long they looked around or how quickly they left. Basic stuff. None of this information is personally identifiable or leads back to you.
My current online payment processor, PayPal, does store your personal information in my PayPal business account, such as name, postal address and email address — just the stuff I need to ship your order. That's all I have access to.
I do not have access to your payment details.
Your email address will only be used if I need to contact you with a question about a book order, which doesn't happen often.