Can anyone offer me advice on finding a few good opening books?

I'm looking for something on the Ruy Lopez for white and the Sicilian Najdorf for black.

I've already got a fairly big collection of strategy and middlegame/endgame books, so now I figure it's time to step in and try and learn a few openings so I don't have to rely on game explorer so much.

Nunn's chess openings is a good book.

warning: That book has no explanation why the position is equal or slightly better 2 white or any annotation at all for example

  1.         2.

1.e4        e5 =

2.d4        d5 =

Thats the way in the book so you better step up in position play if you're gonna buy it to figure out what's going on. But it's a good book.

John Watson is supposed to have good books on the openings.

Don't get one of those specialty books though. If you don't want to play the Ruy, or sicilian anymore your books are just going to be paperweights.

Alexander Khalifman's Opening for White according to Anand 1.e4 Vol. 2 covers a repertoire against the Ruy Lopez Morphy defence 3...a6, and volume 1 covers the Berlin, Petroff, etc.  Arizmendi and Moreno's Mastering the Najdorf offers a repertoire for black.  Both are reasonably up-to-date and quite thorough.

I highly recommend Reuben Fine's "The Ideas Behind The Chess Openings" It will

really equipped you to face any kind of openings you will encounter.