Dangerous Weapons: The Ruy Lopez

Grandmasters John Emms and Tony Kosten, and International Master John Cox are highly respected authors who are renowned for their creative opening ideas and expertise.

I've read various "Dangerous weapons" books by Everyman Chess and I'm happy to see that the quality and development of this series has not faded! I'll recommend this book for players playing with both, black and white, who are looking for a tricky line! Especially the verbal explanations are valuable for players ranged 1300-1900 ELO! But the biggest potential in my opinion lies in Blitz and Rapid tournaments, where some tricky, well analyzed lines can win you some time on the clock and thus yield you a decisive advantage! - dailychess.org