How do I set up a multi-volume manual?

Thank you so much! I really appreciate this. I'll take a look. Yes, I think the folders in a master book might just be the answer too.

Thanks for your reply. When you say numbering, do you mean page, figure and table numbering or file numbering? If the former, the chapters are prefixed with the chapter number. The front matter files have three different numbering formats (if you count no number as a format). If  you're asking if the files are numbered, yes they are (01 filename, 02 filename, etc.). This book contains eight chapters, each with at least one appendix but some with as many as three. Because of the varying page sizes, layouts (portrait vs landscape) and front matter files that repeat with each volume, I have 41 files, and right now they're contained in one book. I'd like to organize the files by volume - not only because I like to keep things organized but because other people in my group will be using the templates I've set up. Is there a benefit to using sub-books over folders within the master book or does either setup offer the same results? I apologize if my questions are ignorant. I've been creating templates - starting with a manual I imported from Word - with no formal training and with no one to bounce ideas off of. I've just been watching tutorials online and reading the Adobe documentation. That worked well for the basics but not for complex formatting and setup. I really appreciate your help with this!