The Blind Man of Seville is the first in the Javier Falcón series by Robert Wilson. It has dropped to $1.99 at Kindle US. I haven't read this series, but read and quite enjoyed Wilson's Gold Dagger winning
A Small Death in Lisbon way back in DTB days, so I may give this one a try.
link:
https://www.amazon.com/dp/B003WJQ6IG