I have attached the afpub file and 2 PDF versions of page 79, where '79 Export' is produced with File-->Export-->PDF (for print) and show error in the typeface (very thin, almost unreadable).
'79 Print' is made with File-->Print-->Adobe PDF . This shows correct typeface.
If you take time to see the apub file you'll see similar errors on pages 23, 53, 59, 67 (caption) - and the text on the pages 72-73, 78-79
The font used in the captions is Times New Roma italic, the font in body text is Adobe Garamond Pro. I'm on Win 10.
I'd be very glad if you would be looking into this.