[Less than 30% of the following repertoire book is on the Open Spanish. But as an answer to the Ruy is maybe the most important part of each black repertoire with 1.e4 e5, it‘s probably better to post here than in the section „Non-Spanish“ or „General Chess“!?]

A Complete Opening Repertoire 
for Black after 1.e4 e5!
by FM Yuriy Krykun
Foreword by Susan Polgar
Thinkers Publishing, 280 pages, ~30 €
End of August 2020

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Table of Content

004 Key to Symbols
007 Foreword by Susan Polgar
008 Preface

PART I - Rare Openings and Gambits
013 Chapter 1 - Odd 2nd moves
019 Chapter 2 - Scotch Gambit
023 Chapter 3 - King's Gambit
035 Chapter 4 - Bishop's Opening
041 Chapter 5 - Vienna Game
055 Chapter 6 - Ponziani

PART II - The Scotch
063 Chapter 7 - Classical Variation

PART III - The Four Knights
091 Chapter 8 - Scotch Four Knights
107 Chapter 9 - Spanish Four Knights

PART IV - The Giuoco Piano
135 Chapter 10 - Aggressive Italians
157 Chapter 11 - Classical Italians

PART V - The Ruy Lopez
187 Chapter 12 - Exchange Variation
201 Chapter 13 - Sidelines on Move 5
227 Chapter 14 - Open Spanish

PART VI - Test Your Knowledge
265 Chapter 15 - Exercises
271 Chapter 16 - Solutions

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There’s a pdf preview (15 pages; toc, foreword, preface, start of chapter 1) at Niggemann or at debestezet:
https://www.debestezet.nl/catalog/product_info.php?products_id=4652

The almost completely black cover looks great!

Regarding the Open Spanish, it’s probably about 5...Nxe4 6.d4 Be7!?, what Krykun has played and teached (at chessable)!? And what has been used by Carlsen, Caruana and others.

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