Personal Books ~ Encyclopedias / Dictionaries as automatic references

Chris Belmonte said:

My question is this: is there a way to make double clicking on a word open up a reference to my own encyclopedia instead of / as well as Lexham Bible Dictionary?

If you built it the proper way (with headword milestones and as type:encyclopedia), you just need to prioritize it higher than LBD for that. 

Chris Belmonte said:

if I have to manually, page by page change stuff, it's not going to work

If your ebook in Word has a way to identify headwords (the Logos edition has them in larger, all-caps, bold type), there could be a Word search & replace function to search for that format and replace all occurrences with something like [[@Headword: %1 ]] or so, where [[@Headword:xxxxx]] is the syntax for a headword and you will have Word supply the found text as argument of the replace text.

This should work in cases like yours - but please refrain from posting an example or sharing the completed work, as PBs are not intended as competition to books sold on logos.com.