[tlhIngan Hol] The Klingon Dictionary - red edition?

[Lieven L. Litaer]

I've done some more research, and this seems to be the 2018 edition of 
The Klingon Dictionary, with an updated cover.

See:
http://www.simonandschuster.com/books/The-Klingon-Dictionary/Marc-Okrand/Star-Trek/9780671745592

> Is it just a reprint of the 1992 edition with a new cover,

Very likely, yes.

-- 
Lieven L. Litaer
aka the "Klingon Teacher from Germany"
http://www.klingonisch.de
http://www.klingonwiki.net/En/NewKlingonDictionary