Subject: Technically, it's not canon
Author:
Posted on: 2015-07-03 02:25:00 UTC
With Star Trek, anything that's not from the live-action movies or tv shows isn't canon, end of story. However, a lot of people will declare elements of non-canon works part of their personal canon. So unless something in one of the episodes contradicts it, feel free to use it, though maybe put a comment in the author's notes or something.
(The EU moment that's totally part of my personal canon? The part from Spock's World where Amanda responds to a tabloid headline about her having married a little green man by saying "There's nothing little about my husband.")