Legal

Orders, updates and refunds

Last updated 20 October 2026

What is on sale

Each book is sold on its own. There is currently no combined offer or discount.

Who sells the books and how checkout works

The Buy buttons open each book's own page on Gumroad, which runs a secure checkout, takes payment and delivers the PDF file attached to that product. This website does not handle payments or card details. Gumroad shows the final price, including any tax or currency conversion, before you pay.

What you receive

One PDF file per book, with its edition number and date printed inside. The worksheets are printable pages inside the PDF, not fillable forms or separate products. There is no EPUB or printed copy.

Problems with a download, and refunds

If a file will not download, will not open or is not the book you bought, email ezekiel@theshipdoctor.com with the product title and your Gumroad order reference and we will help. If you would like a refund, email us with the same details and tell us why; refunds are issued through Gumroad. These terms do not remove any rights you have under the consumer law that applies to you.

Editions and corrections

Each guide shows its edition number and date. When we correct or update a guide, we record the new edition and keep previous versions on file. We do not promise lifetime or unlimited updates.

Support

Email ezekiel@theshipdoctor.com with the product title and, for a purchase, your order reference. Never send payment-card details by email.