The blogginess is mostly just their presentation style - it certainly doesn't detract from the fact that they're far more likely to give you a decent answer than a random fad-riding book churned out by a publishing house whilst things were still being decided.
For methodical, use the
element index - the new/changed elements in HTML5 have an "our prognosis" link for more details on it.
For jumping in to the interesting stuff, scan through
the archives for interesting looking stuff.
If you want portable, get a portable computer and use a web crawler to create an offline copy.
If you don't like reading from screens, get a kindle or similar device that gives you that crappy e-ink stuff.
If you *still* want a book, get one written by an author who isn't writing about the subject for the first time, and who has a website indicating that they know what they're talking about.
The Up and Running book by Mark Pilgrim might be ok in that respect, but it's also nearly a year old.
The other one is newer, but it's by two ex-Flash developers, and is their first book on the subject, so (unless you've had it strongly recommended) I'd not have it on any shortlist.
But I'd still recommend not spending money on a unchangeable paper copy for something that is still being moulded.