Elmo is right.
Using something like the booklet layout (selected when starting a
publication) produces something called "printers pairs". On a 16 page
booklet it matches up page 16 and 1, 2 and 15, etc. The last page with the
first, second with the second from last, etc.
Then these sheets, after printing, are folded and stapled to produce a
booklet.
Unfortunately books often have hundreds of pages and the last thing you want
to do is match the last with the first! That simple act on your part will
either cause the file to be rejected or cost you hundreds of dollars more
because they will have to find a way top undo what you so helpfully tried to
do.
Also books are produced in many different ways. And each process can
require a different way of arranging pages. You should not be expected to
know this. .
The printer knows these ways and has invested (sometimes thousands and
thousands of dollars) in special software to arrange pages the right way for
the books they produce.