Book file too big

[HSC Italian]

Hello Framers,
 
I have a book that consist of close to 500 files. The total page count is shy of 900.
 
The problem: I cannot print a .pdf. I've created mifs to correct the issue in a given file and it worked, but then a few files down it did it on another file. I mifed ALL the files, tried to print to PDF again and now it stopping on one particular page. I've mifed it, I've saved the content in a new file container, blah blah. It won't go budge!
 
Is it possible this book, with umpteen xrefs to other files in the book is just maxed out?
 
Any insight is much appreciated!
 
Heidi 
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