You mean the XSLT 2 book [amazon.co.uk]?
I have a subscription to O'Reilly Safari. It's not in there. If it's as good as you say, I'll get it. I know who Kay is. I've had dealings with him, and agree with your assessment. We got Saxon SA [saxonica.com] for our infrastructure system, then didn't use it, because PHP plays such a huge role for us.
I think I mentioned, somewhere, that all the help and documentation are for XSLT 2, which, combined with $2.50 will get me a Venti Latté at Starbucks. The same goes for the mulberry list [mulberrytech.com], which does have the XSLT "heavy hitters" on it. I've learned not to ask XSLT questions on that list, because I get tired of being told XSLT 2 answers.
I'm not kidding. The XSLT community has completely abandoned XSLT 1, and has absolutely no patience whatsoever for people who use it.
We actually use XSL-FO and XSLT in my "day job" quite a bit, and XML is a "Swiss army knife" for us.
I agree with httpwebwitch's complaint about Schema, but I've run into similar issues with XSLT 1 (which is why there is an XSLT 2).
It would be great to have some company over in the XML Forum [webmasterworld.com]. I certainly don't claim to be an expert. I'm just a poor schlub who had to larn this here new-fangled X-stuff on my lonesome, and have some compassion for others in the same boat. I'm thrilled to have someone as experienced as httpwebwitch over there.