
1) Book design
Found on
https://www.crosswordclues.com/clue/postface

A postface is the opposite of a preface, a brief article or explanatory information placed at the end of a book. Postfaces are quite often used in books so that the non-pertinent information will appear at the end of the literary work, and not confuse the reader. A postface is a text added to the end of a book or written as a supplement or conclus...
Found on
http://en.wikipedia.org/wiki/Postface

concluding note added to end of written work
Found on
http://phrontistery.info/p.html
No exact match found.