Fridays

What’s a Friday?

A Friday is a short, highly focussed book, typically addressing a specific technical topic. It’s written to the same high-quality as all our other books. Fridays are only available in PDF format. We typically charge between $7.50 to $10.00 for a Friday PDF.

How Do I Buy a Friday?

Just like any other of our books. Go to our store, add the titles you want to your cart, and check out. Once you do, your order will go to our fulfillment system, and you’ll receive an e-mail containing download instructions.

(For this reason, it’s important to give us a valid e-mail address

What About Updates?

As with any of our PDFs, you automatically qualify for unlimited updates to that edition of the PDF you bought. Simply go to your personal account page to check the status and regenerate any PDFs that are out of date.

What’s The License?

You download the PDF for your own use. Treat it like a regular book: carry it around, show it to friends, but don’t copy it and give the copies to other people (or allow other people to take the copies).

What DRM Do We Use?

The PDFs we send out are unrestricted. You can download, print, archive, and so on. We like to think we can trust our readers not to publish our work to others.

You’ll find that when you receive the PDF, each page has your name in the footer. It’s a gentle reminder that this PDF is yours, and that you shouldn’t give it to others. We also encode a small amount of identification information into the structure of the PDF—this contains no personal details, but it lets us know who ordered a PDF should it ever escape into the wild.

Can I Buy Them Through [Amazon, Overstock, ...]?

No. The PDFs are only available for purchase through our site.

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