Here is the error message I get.
"Cannot open "Chapter 2.indd" because it was saved with a newer version of Adobe InDesign (CS.8.0).
You must use that version or later to open the file. To then enable it to be opened in this version, choose Save As InDesign CS4 or later, or export to IDML."
It doesn't make sense.
I've moved your question to the InDesign forum.
It means that the person who created the file was using InDesign CC or InDesign CC 2014. They (or someone else who can open the file in those programs) needs to save the file as IDML and send you the IDML file. You can open the IDML file in your version of InDesign.