No, these books don’t exist but I think they would be a great addition to the Kodeco library.
Every now and then, I come across a feature of Xcode in one of your articles, tutorials, videos or other books, and I think I’d like to know more about that or I wish I’d known about that a while ago.
Just as one example, whilst working through an iOS article // TODO: was being used but no mention was made of the Jump bar and how // FIXME: and // MARK: could also be used. I wouldn’t want this iOS article (on View Modifiers) cluttered with detail about Xcode but referring to a reference book (Xcode Apprentice) would be a boon.
Maybe all this information about Xcode is already there in other learning materials but pulling it all together would be great.