Hunt for the Ring:

A seventeen year search for the One Ring. Sauron involved the Ringwraiths, orcs, and many spies in this search. Sometime between the years 2980 and 3009 of the Third Age, Gollum was captured on the borders of Mordor and tortured by Sauron. Though Gollum did not give out much information, he did give Bilbo's name.
The Ringwraiths discovered the Shire in 3018, but did not find Frodo until they ambushed him on Weathertop on October 6. Even then he escaped them and continued to do so, making it to Rivendell. After this point, there was very little said about the hunt for the Ring.

The Hiding of Valinor:

The raising of the Pelóri and the establishment of the Shadowy Seas and the Enchanted Isles as a barrier to both Morgoth and those of the Noldor who had left Aman against the will of the Valar.

The Lord of the Rings
The Silmarillion
The Unfinished Tales
The Hobbit
The Complete Guide to Middle Earth by Robert Foster