You can use an ePub license to embed the font in an electronic publication such as an eBook, eMagazine, eNewspaper, or interactive PDF.
An ePub license is based on the number of publications in which the font is used. Each issue counts as a separate publication. Regional or format variations don’t count as separate publications. Updated versions of publications that are free to previous customers do not need a new license; otherwise, each new version that is released counts as a separate publication.
For font usage in graphic images shown as the ePub cover, consider a Desktop license instead as most allow for it.
You are bound by the Agreement and you acknowledge that all Use of the Licensed Web Fonts is governed by the Agreement.
You are hereby granted a non-exclusive, non-assignable, non-transferable license (subject to all of the terms and conditions of the Agreement) to (a) embed the Font Software (i) into an Electronic Publication, including an Electronic Publication that is a Commercial Product, (ii) in a secure manner which does not allow an End User to access to the Font Software outside of an Electronic Publication, and (b) distribute worldwide such Electronic Publication to End Users. Zeune Ink Foundry reserves all rights not expressly granted to you in this Agreement.
Restrictions on Use
The maximum number of separate and distinct Electronic Publications into which the Font Software may be embedded may not exceed the number of Electronic Publications you indicated at Zeune Ink Foundry when licensing the Font Software.
For avoidance of doubt, each Issue of an Electronic Publication counts as a separate Electronic Publication, however regional or format variations of each Issue of an Electronic Publication shall not count as a separate Issue.
The Font Software must be embedded within a file format that protects the Font Software by means of encryption or obfuscation. Formats that meet these criteria include, but are not limited to, PDF, EPUB 2.01, EPUB 3, and KF8. The Electronic Publication must be a non-executable file which is displayed by e-reader software or on e-reader devices. Font Software may not be installed in the operating system on which the Electronic Publication runs.
You agree that you will take no action which will have the direct or indirect effect of causing the Font Software thereof to become Publicly Available Software or otherwise be subject to a Publicly Available Software agreement.