Where did you obtain a commercial license for the use of the Bookerly font? From what I understand, it is exclusive to Amazon for their devices and you can't purchase a license anywhere.
Bookerly is available everywhere and the
claims are it is free for all use. But... you made me look deeper...
This is from their license statement in their font zip file (
emphasis added):
Amazon Type Library Usage Guidelines
Overview
Amazon has created a limited library of typefaces for use across all products, interfaces, and
websites.
These fonts are fully owned by Amazon, making their usage free to all internal
product teams. Fonts other than those listed below, such as Palatino, Baskerville, Caecillia, and
others are licensed from their respective rights holders (generally Monotype Corporation). To
use these other fonts with your product you must secure a license that covers the distribution
and display of the desired fonts.
Here is a list of the designs fully owned by Amazon and their intended usage:
Bookerly (eInk, LDC,3 weights and italic) Reading and Display
Bookerly Display (2 weights and italic) UX and Display
...
All of these fonts were developed under contract for Amazon - as a result Amazon owns them
fully outright.
To include these designs in your work there are no licenses payments, no
royalties, no copyright or attribution notices required. The font itself carries the proper
ownership and copyright information in the header metadata of the font and Amazon does not
require any additional attribution or protections when using the font....
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Damn... rather than worry about the word salad of their "Amazon Ember Licensing Guidelines" I'll use another font for print.
R.C.