Caro, I have not read the book but I've read countless discussions about it!
The language is extremely opaque and the visual examples he gives are also difficult to interpret (and might be even harder to interpret for anyone who didn't live through the 80s).
But I think his emphasis on line and the kind of pattern and detail that is best suited to style "type" is quite interesting and helpful.
It can be very difficult to self-categorize accurately. We've had lots of discussions about that on here.
Two sites that include a lot of Kibbe talk are the Seasonal Color site; here they have a self-test with illustrations, which can help a bit.
And 12 Blueprints has quite a lot of Kibbe stuff, too.
Sveta had an epiphany when she recognized herself as a "soft-dramatic." Alexandra has been categorized (by a consultant) as a "flamboyant gamine." Others have found it just too difficult to get a clear read on themselves.
Initially I thought that I was a dramatic classic, but I've come to feel that I am probably some species of gamine, too -- probably also "flamboyant" -- although that word is enough to make me blanch and many of the examples for that type are enough to send me running for a paper bag to wear.
Vildy's right, I think, that the concepts of "yin" and "yang" are a big part of what he works with. Yin being softer, rounder, more delicate, "feminine" and yang being straighter, sharper, harder, more "masculine." So if you look at your own lines, what outfits will complement those lines? What details will emphasize your inherent energies?