We believe that all print books should come with a digital version, and we don’t believe that you should have to pay for content twice, so Engine Publishing offers a PDF guarantee for all of our books:
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All books ordered from our online store automatically come with a free copy of the PDF version, but it doesn’t end there. When you buy one of our books from a retail store, at a convention, or anywhere else that doesn’t automatically provide you with a free PDF copy, just email a photo or scan of your receipt to martin (at) enginepublishing (dot) com and we’ll send you a copy of the PDF version for free.
Our PDFs are fully bookmarked and hyperlinked, DRM-free, and come with EPUB, MOBI, and plain text versions, as well — all included for the same price, and all free when you buy one of our books in print.