I recently found this book at a used book store. It is one of the most cited works in Art History scholarship.
The original was published in 1888 in German. This is one of the few English translations. Wolfflin is concerned here with the transition from Renaissance to Baroque and the development of the painterly style.
The subject matter is actually mostly architecture and not painting. It might seem that architecture could not be painterly. But it can be. And you will understand if you have the chance to read this volume, which is not long (160 pages).
St Peters in Rome is a 'painterly' building. Bernini's sculpture is painterly...
Anyway, I think this is a very useful book for anyone interested in painterly realism - which is most of the people here, I think.