
David J. Peterson
David Joshua Peterson is an American language creator. He came to prominence after creating the Dothraki and Valyrian languages for the television series Game of Thrones. He has subsequently worked on a number of other projects, including the films Dune and Dune: Part Two, for which he created the Chakobsa language. He has written a book on language construction entitled The Art of Language Invention.
Excerpt from Wikipedia, available under CC BY-SA 4.0.
Books

The Art of Language Invention
2015
ISBN 9780143126461
Create Your Own Secret Language Invent Codes, Ciphers, Hidden Messages, and More
2020
ISBN 9781250222329