Slide film is a complex technical product, so any in depth analytic treatment of it will inevitably become somewhat "techy". It is IMHO also a material with very specific characteristics (contrast, color saturation, color representation in general), which makes it incredibly useful for many kinds of artistic expression.
If you want to explore the artistic merit of slide film's image properties, you're best off with books about color in (artistic) photography. Then use image resources like pbase and flickr to search for color representation of slide films available to you, including application of special process modifications.
If you want to take a closer look at the technical background of E6 processing without too much technical detail, take a look at
Kodak's Z119 manuals. Grant Haist's book "Modern Photographic Processing, part 2" also contains a long chapter on color reversal processing. While the chapter focuses on E4 process, from a conceptual stand point these two processes are not all that different.