Thank you, Ernest.
I do want to let you know of two workarounds I decided on.
1. I could not get conditional text to work. Instead, I’m automatically adding prepended and appended text in my OSX Numbers spreadsheet using concatenate commands etc.
2. I could not get the PDFs to open into anything but the unsecured nativebbrowswr and not the surrounding post, so I’ve compromised and decided not to use any PDF search at all. Instead, I will let the user search for Books with your system, but they will individually search the PDFs using the secure viewer in my layouts. I know that you said that it’s not realistic to think that anything will be totally secure on the Internet, but in this case, I have very little content, and my audience is well known for simply downloading entire documents at once. This is at least making it one step more difficult to do so. I know that you suggested a change in the import method and importing the posts as well, but I kept getting duplicate post in the index and gave up.