I have a book in this opening, but it cost about $30.But I have a Very Good pdf book.You can contact me if you really want
I want to learn the Ruy Lopez

Books:
1. The Ruy Lopez by L. Barden (1967)
2. Mastering the Spanish D. King and P. Ponzetto (1993)
3. Starting Out: The Ruy Lopez by J. Shaw (2003)
4. The Ruy Lopez Move by Move by N. McDonald (2011)
5. First Steps: 1.e4 e5 by J. Emms (2018) ... has a large section devoted to the Ruy Lopez geared for lower level player (my contribution ... perhaps best resource to start?)
Games (specific players):
Books & games of Keres, Bronstein, and Fischer.
Games (in general):
-Go over at least 1,000 Ruy Lopez GM games in databases.
-At the low end, no more than 1-2 games a day.
Spend at least 7 hours.
Don’t (Scotch, tactics x3).
at this stage no need to learn opening
"... everyone is different, so what works for one person may likely fail with another ..." - NM Dan Heisman (2002)
https://web.archive.org/web/20140627084053/http://www.chesscafe.com/text/heisman19.pdf
It might be of interest to look at the table of contents of A COMPLETE CHESS COURSE by Antonio Gude: "... 1 The Basic Rules of Chess 7 ... 2 Your First Chess Games 23 … 3 Openings and Basic Principles 33 ... 4 Putting Your Pieces to Work 52 ... 5 Strategy and Tactics 76 ... 6 Endgame Play and Further Openings 106 … 7 Combinations and Tactical Themes 128 ... 8 Attacking Play 163 ... 9 Your First Opening Repertoire 194 …"
http://www.gambitbooks.com/pdfs/A_Complete_Chess_Course.pdf
In some ways, a very plausible suggestion.
https://www.newinchess.com/media/wysiwyg/product_pdf/7790.pdf
https://chesscafe.com/book-reviews/first-steps-1-e4-e5-by-john-emms/
There are about 80 pages with a lot of attention to introduction of various Ruy Lopez ideas. However, at some point (after about fifty pages), GM Emms started to give attention to his suggested defense for Black.
If someone wants to learn about the Ruy Lopez, I can't help thinking that the person should see some discussion of
even if it is only for the purpose of convincing the reader to avoid the line.
If you want to learn the Ruy Lopez quickly, just scroll through Bobby Fischer's games
Again, in some ways, a very plausible suggestion, but hasn't a lot happened since 1992? Also:
"... [annotated games are] infinitely more useful than bare game scores. However, annotated games vary widely in quality. Some are excellent study material. Others are poor. But the most numerous fall into a third category - good-but-wrong-for-you. ... You want games with annotations that answer the questions that baffle you the most. ..." - GM Andrew Soltis (2010)

You can subscribe to just section one of chesspublishing.com. It is only 19.95 for 1 year. You can also do 3 (39.95), 6 (69.95) or all 12 (99.95).
I myself am subscribed to only section 2 (French). So you do not have to waste your money on sections you do not want.

The Ruy Lopez is too complex for someone with your rating. I suggest a less complex opening and instead of trying to learn the Ruy Lopez--do what is best to increase your over all playing strength.
The Ruy Lopez is too complex for someone with your rating. ...
"... Note that, if White wishes, he can rule out the Berlin Endgame by [1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6] 4 d3 (or 4 Qe2). Similarly, [1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6] 5 d3 stops the capture on e4 and so prevents the Open Variation. … You should give serious consideration to these avoidance measures … They have been used regularly by Carlsen and other top players and don't give Black an easy life. From a practical point of view, it saves on the amount of theory you have to learn and denies the opponent the chance to play what might be his favourite defence. …" - GM Neil McDonald (2011)
"
… is my suggestion [to readers of First Steps 1 e4 e5] for when you are playing Black against the Ruy Lopez. You can also play 5...b5 and 6...Bc5 against moves such as 5 d3 and 5 Qe2. …" - GM John Emms (2018)

The problem is that if a 1400 rated players spends the time needed to learn the Ruy Lopez what will he do when he opens 1. e4 and his opponents respond 1. ... c5 or 1. .... c6 or 1. .... e6 or 1. ....Nf6
or 1. .... g6 or 1. .... d5 ??

False dichotomy. You're saying they either have to master it or not play it at all.
None of us master openings, we're all learning as we go.

The problem is that if a 1400 rated players spends the time needed to learn the Ruy Lopez what will he do when he opens 1. e4 and his opponents respond 1. ... c5 or 1. .... c6 or 1. .... e6 or 1. ....Nf6
or 1. .... g6 or 1. .... d5 ??
Agreed. Best to study up to 8 to 10 moves only. So there will be time to study other response to e4.

The problem is that if a 1400 rated players spends the time needed to learn the Ruy Lopez what will he do when he opens 1. e4 and his opponents respond 1. ... c5 or 1. .... c6 or 1. .... e6 or 1. ....Nf6
or 1. .... g6 or 1. .... d5 ??
I played the same 1. e4 c6 for 10,000 games and I will spend about 5-10 seconds for 15-20 moves of opening. ( main line only).
"... Note that, if White wishes, he can rule out the Berlin Endgame by [1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6] 4 d3 (or 4 Qe2). Similarly, [1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6] 5 d3 stops the capture on e4 and so prevents the Open Variation. … You should give serious consideration to these avoidance measures … They have been used regularly by Carlsen and other top players and don't give Black an easy life. From a practical point of view, it saves on the amount of theory you have to learn and denies the opponent the chance to play what might be his favourite defence. …" - GM Neil McDonald (2011)