I suppose so. And they would defend against anything that tried to cross through the book's cover, I suppose. And even then only until the book moved, since wards are always immobile.
Agreed. Wards are immobile, so would be destroyed if you moved the warded object.
In any case, you are using the geometric definition of area, while DFRPG uses a geographical one. The basic definition is given in the second sentence of the Wards section on YS276:
"It’s intended to protect an area—usually a home or sanctum—from physical or magical intrusion."
You don't like that ambiguous bit with the word usually? Ok, remove it, leaving the unambiguous remainder behind:
"It’s intended to protect an area from physical or magical intrusion."
You can intrude into a geographical area, you can't intrude into a car tire (except by trying to climb through it; in this case it's basically the moral equivalent of a small doorway). Also, from the next page:
"Wards don’t have a “scale” concern, the way that veils do, and they cannot move."
gets
Again, "they cannot move". They are immobile. Not sometimes or usually immobile; they cannot move period. Immobile like a doorway is, but like a book tends not to be.
I wasn’t deliberately using the “geometric” vs “geographic” version of area, and I have no problem with the word "usually", it’s you that seems to have the problem with it. My feeling is that it is there deliberately because while wards are typically used to protect areas, that is not their entire function.
We agree that wards cannot move, and thus if you warded an object the warding would only last while that object was motionless. However, that doesn’t preclude warding an object. I can see reasons to ward objects – you don’t want to ward the door to the hotel room, as that might accidentally harm room service, but you don’t want anyone stealing the valuable statue? Ward the statue (doesn’t have to involve permanent markings) – that way if anyone attempts to steal it, the ward activates and harms the thief, but not the person changing the sheets.
My feeling is that the words "almost always" and "usually" are are a deliberate choice - particularly as the phrasing gets used more than once in regard to warding. By excising those words to suit your argument, you are changing the entire intent of the sentence.
By a reading of the book wards are
typically used to protect Thresholds, doorways and windows, but there are other uses (e.g. warding of objects), with the limitiation that whatever is warded cannot move.
You are suggesting that the word "usually" is an anomally, but reading the entire passage shows that the ambiguous phrasing is used multiple times, indicating that it is deliberate, and that you are interpreting the passage in a restrictive manner because that's how you want the rules to work. That's fine, but is not how the rules
are written, which is what I was pointing out.