That's the book by Stevenson I brought up earlier. Either I'm on your ignore list (in which case you won't see this either

) or you just missed it.
I make extensive use of Amazon.com's "Look Inside" and Google Books to virtually browse books much in the way you describe for the physical thing. If a few "Surprise me" hits don't give me a flavor for the book, I'll use the Kindle or Nook apps to get the first chapter or so as a sample.
I used that to take a look at Clair and, as compared with Stevenson, it seems quite a bit more "formal." I couldn't assess if it make use of a common unifying project or not though. By comparison Stevenson's book gives a decent enough "overview" of themes in Cocoa to build some familiarity with the concepts, so that when you do go use a more formal book (Kochan, Hillegass or Clair) you won't be so lost.
Again, only the individual reader can assess whether the tone of the material resonates with them by perusing it.
B