There are two Spanish language books for this conflict that I can recommend - one covers the siege of Pensacola, and the other the siege of Gibraltar. Both are similar to Ospreys in terms of content, layout, size etc, but are a mix of MAA and Campaign formats. They have useful colour plates for both sides, although there are a few minor mistakes in the British ones (although nothing like the "howlers" in the Kiley/Smith so-called encyclopedia!!!). They aren't easily to hand at the moment, so I can't give you the exact titles, but they are part of a much larger series on historic Spanish battles.
I suspect you mean the
Guerreros y Batallas series. Osprey format, with lovely plates but with more text. Very good value for money, they are actually much better than Ospreys IMO. I have the title on the near contemporary campaigns between Portugal and Spain in southern Brazil and it's excellent giving a nice counterpoint to my Brazilian sources.
Here's the website of the publisher, I seem to recall picking up my copy in Buenos Aires, some years ago but IIRC they may have appeared on Helion's catalogue at some point. At any rate try the publisher.
https://libreriaalmena.com/Edit: Found the title you need:
https://libreriaalmena.com/epages/f2c787be-7ad4-49ec-9af0-263ed2e4f807.sf/es_ES/?ObjectPath=/Shops/f2c787be-7ad4-49ec-9af0-263ed2e4f807/Products/gb07You really can't go wrong for 14 euros.