Metadata to ensure audio CD has tracks in the correct order when burned from iTunes

I have a public domain audiobook from librivox.org which I want to put on CD for a blind friend.  I want to add a table of contents to the beginning of each CD.  The total length will take six CDs without a lot to spare, so I am planning on seven after I add the TOC files. The files already have track numbers matching the 27 chapter numbers, i.e., 1 0f 27, 2 of 27, …, 27 of 27.  Since I only have ten blank CDs, and they are CD-R (write only once), I am reluctant to answer this by experimenting. Do I need to renumber all the files, including my additions, so that each CD starts with track 1 of N? Or can I make my additions track 0 of 27, disk X of 7 and still have the addition be the first track on its CD? Or to put it another way, if the metadata for disk two is 0/27, 5/27, 6/27, etc. will the CD be in that order? Or scrambled, or even just create an error message? When I imported an unrelated two-disc album, the CDDB made it two separate albums, so I can't judge by that. Would it work better to take them out of iTunes and burn the CDs some other way?