Likewise, the TOS line could occasionally do a book in the movie era, the 14 years in between TMP and KHAN, etc.
It's 12 years between TMP and TWOK. The Okudachron's rather odd 2271 placement for TMP was subsequently disproven by VGR: "Q2" establishing that Kirk's 5-year mission ended in 2270. Since TMP is at least two and a half years later, it's now accepted as taking place in 2273. TWOK's 2285 placement is problematical in itself (15 years after "Space Seed" should be 2282), but it's been referenced by so many books now that we're stuck with it.