Have finished, barring the Appendices - and am up to the family trees.
Am wondering - why didn't Ar-Pharazon try to take the Ring from Sauron when he took him prisoner? I take it Sauron had him in a kind of spell, since he managed the Downfall of Numenor through his "imprisonment." If Ar-P desired immortality, the Ring would have given him that - after a fashion. Maybe Sauron deflected this with a very lyrical hard sell about invading Valinor.
Or maybe this is told in more depth somewhere else (Unfinished Tales, perhaps), and I've forgotten it.