1) I want to ask about the room which was the end point for the book (e.g. To what room the book was taken?)
assertion: The book was taken to that room
question:
Where was the book taken
2) I want to ask about origin place, from what room the book was taken to this room
assertion: The book was taken to that room
question:
Where the book was taken?
3) Compound 'wh' questions
from the first example:
Do you know where the book was taken?
from the second example:
Do you know where the book was taken? (exactly the same)