I had a hand in revolutionizing production on these booklets. Some sections of each booklet were unique, some were shared. My suggestion of treating each section as their own InDesign document limited the chance of errors when making changes. The main booklet linked all of the unique and shared section documents together and only needed to be updated as the individual documents had changes. This minimized repitition and the problems that can crop up when making the same changes over and over in what ended up to be a total of 15 booklets in 5 languages.