Help center
Questions & answers
Everything about downloads, devices, gifts, payment and refunds.
How do I receive my book?
Right after payment, your PDF is ready to download on the confirmation page. You also receive an email with a private link to your downloads, so you can come back anytime.
Which devices can I read the PDF on?
Any device that opens PDF files: computer, tablet, phone or e-reader (Kindle, Kobo, reMarkable…). No app or account is required.
I lost my download link. What can I do?
Go to My library, enter the email you used at checkout and we will send you a secure link to all your books.
Can I offer a book as a gift?
Yes. At checkout, turn on Send as a gift, add your recipient’s name, email and a personal message. They receive their own download link.
Do you offer discounts when buying several books?
When bundle pricing is active, the discount is applied automatically in your cart as soon as you add enough books. No code needed.
Which payment methods do you accept?
All major credit and debit cards, Apple Pay, Google Pay and Link, processed securely by Stripe. Your card details never touch our servers.
What currency are prices in? Do you add taxes?
Prices are in USD. The total shown on the payment page is the final amount charged. If you pay with a card from another country, your bank may add conversion fees.
Can I get a refund?
Because PDFs are delivered instantly, digital purchases are final. If your file is defective, not as described, or you were charged twice, contact us and we will make it right. See the refund policy.
Is this medical advice?
No. The books are educational and do not replace advice from a physician or qualified health professional. See our health disclaimer.