While I can understand that ST might not have quite the same amount of interest for kids as stuff like SW, I still reckon they could have at least put out an annual or a young adult adaptation.
Americans don't do British-style annuals. There's never really been a Star Trek equivalent to, for example, the current or past Doctor Who Annuals and Storybooks, just the old UK Trek annuals Ian mentioned, which were largely reprinted from American comics.
The absence of a YA novelization is a little more surprising, though, given that many of the past Trek movies had them, even when Pocket wasn't generally publishing YA Trek.