That's not exactly right. What those of us who wrote Marvel novels for Pocket were told (at least by Marco, for the books he edited in that line) was to approach them with the sensibilities of a movie, i.e. making them standalone stories accessible to a general audience and not worrying too much about comics continuity (though some of us did tie closely into the comics anyway). It wasn't about referencing the specific continuity of the movies at the time. The approach of Pocket's TOS novels these days seems to be just telling classic TOS-style one-and-done adventures.