No, but the cost is like 3.99.
I just purchased two of your notebooks (Digitakt and Digitone).
They look very useful for me as a newbie. And as a graphics designer I appreciate the fact, that you invested so much time into a pleasant design.
Thank you!
Thanks @mbms
For general info, firstly a big thank you to the support we get for these books. I have to say that the hours put in are pretty high and it typically takes 3-4 months. The cost is held at the price of a cup of coffee which we think is fair and affordable for paid updates every 12-18 months. The running cost for web, domain and card fees take big slice of this too.
We actually surveyed customers last year and nearly 80% preferred a low price / paid updates over high price / one off payment. We also give discount codes for first week of update and free to people who purchased within a couple of months prior to a new version release.
Thanks once again for your wonderful support
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In my opinion you can easily raise the price to 1 1/2 or 2 cups of coffee for 250-350 pages of quality content. 
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