I am writing a book, using the InDesign Book feature.
My book has 18 chapters, each a different InDesign document.
I would like to be able to search for all occurrences of text, without having to open each document. I would like the results to be a panel something like Adobe Acrobat's Find in Files panel.

This is useful when I think I've written on a topic in some other chapter, and want to link text in the current chapter to the other chapter.