The two books I have is RTC9868cc and RTC9868cb, CC is the one I use the most, but, CB was issued in 1986 and CC issued in 1989. My 90 is 85 even though I use CC for it but my guess is you also need the CC revision.
They cover the 2.3, 2.5 diesel and petrol and some Diesel Turbo but dont expect much for the diesel turbo engine, they were revised so much the books probably couldn't keep up!
Dont read into too much about revision dates, very little got revised, just get the latest revised book for your engine type and you should be good with most other things.
Also, some older parts are better replaced with revised parts, seatbelt inertia reels for instance to lose that stupid fixing down in the corner of the seat box.