The Art of Hollywood’s Made-Up Languages, from Dothraki to Klingon [video]
wired.com
wired.com
[1] https://arstechnica.com/gaming/2017/03/decrypted-the-expanse...
https://www.amazon.com/Art-Language-Invention-Horse-Lords-Wo...
Also, if you're interested in languages invented for TV and movies, read David Peterson's "The Art of Invented Languages", in which he describes how he created Dothraki and a whole bunch of other languages, including writing systems. As a linguist who would love to get into that kind of thing (and who has studied some very obscure languages which would make good influences), I totally enjoyed this. A little more technical than Arika Okrent's book, but still very accessible.
The video is blocked in my job. I just noticed the large white square in the article.