an ordinary chessplayer wrote on 01/15/21 at 13:38:05:
If you don't mind older books either of these would be a reasonable one-volume reference on the Spanish, of course with the caveat they are both hopelessly outdated on the Berlin:
- Suetin (1991) The Complete Spanish
- Lane (1991) The Ruy Lopez for the Tournament Player
Neither one is a repertoire book a la Bologan. Suetin is a traditional tree style, and Lane is a collection of annotated complete games. Nowadays books tend to be more specialized, one could argue perhaps too specialized.
Speaking of older books, I'm reminded that ChessPublishing's own Glenn Flear wrote three books on the Ruy Lopez for Everyman in the early 2000s (and btw. these don't seem to have been hit by the extreme out-of-print/hard-to-find pricing yet):
Open Ruy Lopez (2000)
Offbeat Spanish: Meeting the Spanish without 3...a6 (2001)
The Ruy Lopez Main Line (2004)
Judging from the quite favorable Amazon reviews, these three books between them should cover most of the Ruy Lopez, with the Marshall Attack the most important "omission". But of course there are other books for that one, including two by Pavlovic and one by Vigorito. Everything with 5...Bc5 (Möller, Arkhangelsk and Yurtayev), the Modern Steinitz (3...a6 4.Ba4 d6) and any unusual stuff on move 4 or 5 likely also missing. And here too the Berlin part is likely even more outdated than everything else.
I only bought the book on the Open myself, mainly because Flear is a recognized Open Ruy specialist. But he is quite good at explaining things, and after all these years the complete game format of these books becomes an advantage. Most of the concrete theory is outdated anyway, so strategic explanations are the main reason they may still be worth getting.
I'm a bit surprised nobody has mentioned Grooten's
Understanding Before Moving volume on the Ruy and Italian. I just noticed a 2nd edition of this has been published recently:
https://thinkerspublishing.com/product/understanding-before-moving-part-1-extend...Though maybe the thinking is this book is around the same level as "First Steps" and not a really a step up.
Finally, let me mention Jansa's 2003 Batsford book
Dynamics of Chess Strategy, which is much more focused on explaining specific openings than the title suggests. The White side of the Ruy Lopez is one of those openings and gets around 80 pages (the Grünfeld and the Sicilian Scheveningen also feature heavily).