I've recently became interested in this variation from black's point of view:

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3 Na5 10.Bc2 c5 11.d4 Qc7

...and was trying to investigate sources, particularly with 12.Nbd2 cxd4 variations.

New in Chess Yearbooks seem fascinated with 11...Nd7 but not Qc7, which means the most recent resources are:

1) Chesspublishing (of course) but I'm not a subscriber to 1.e4 e5 (at the moment...)
2) Marin's Spanish book, which I have, but that covers only 12.Nbd2 Nc6 and 12.Nbd2 Bd7 (latest NiC YB covers this based on So-Carlsen I think?)
3) Flear's Main Line Ruy Lopez book, which is older than some IMs these days but presumbly gives a good overview.
4) Whatever random overpriced Chessbase DVDs exist (I'm not really interested in this unless there is a particularly good one I don't know)

So are there any other resources (even older but good ones?), or is it just time to grab a Chesspub subscription, database and engine and work on my own?  I'm willing to investigate some old books by e.g. Keres, Geller etc if there is a particular recommendation.