Bookerly, while great for reading, is unfortunately a proprietary font that's under copyright by Dalton Maag/Amazon, and its inclusion CrossPoint Reader is probably not legal (YMMV depending on where you're from, but I'd assume this is the case in most places).
Some open-source alternatives available under the SIL Open Font License (OFL) that you could potentially look at as replacements with lots of character support are Noto Serif (the Google Fonts version is outdated, you'd want the version from the project's repo instead) or Literata.
This is the copyright notice found in the Bookerly files:
Copyright 2014 Dalton Maag Ltd. Modification of this file requires prior written permission from Dalton Maag Ltd.
Bookerly, while great for reading, is unfortunately a proprietary font that's under copyright by Dalton Maag/Amazon, and its inclusion CrossPoint Reader is probably not legal (YMMV depending on where you're from, but I'd assume this is the case in most places).
Some open-source alternatives available under the SIL Open Font License (OFL) that you could potentially look at as replacements with lots of character support are Noto Serif (the Google Fonts version is outdated, you'd want the version from the project's repo instead) or Literata.
This is the copyright notice found in the Bookerly files: