| of experts. I'd suggest trying to download a free trial version of PageMaker and use their "make booklet" function, because it sorts the pages exactly the way you need them.
Word is notoriously bad for being able to do any fancy desktop publishing. That's why I prefer Adobe products like PageMaker and FrameMaker instead of Word.
Can you contact the print person at Office Depot and ask them if they can print the book the way you want? I'm assuming you are going to send them electronic copy for them to run off.
The worst case scenario is to do it the old-fashioned way: Print a master copy out by hand, and collate the pages the way you need them (at best), or (at worst) do paste up by hand and bring it in to Office Depot physically. | 
