Hey guys,
I recently started to read up on programming in Android and one of the textbooks pdfs I recently got will not function on my reader properly. When I try to read it, it will work fine up until the table of contents, but after that, all of the pages are blank

I thought maybe it was a dumb pdf, but then I opened it in PDF to Go and all of the pages were there.
May I have some insight on this problem? Is this a common occurrence, or something easily fixed? Thanks in advance guys.