Hello HealthyTry

I want to wish you very welcome on here !
It's so very good that you are reaching out, there will always be members here who will help you navigate stormy waters. And we all know a live with a loved one with BPD can be quite stormy :-P
You are asking whether it's a good idea to tell your husband about books you are going to read about BPD. Does your husband have a diagnosis ? If so, has he accepted it ?
I think generally it's a bad idea to tell our BPD that we think they have it. It will be perceived as blaming and will not improve the situation. I have seen some posts of people on here who did tell, and that generally didn't go too well.
Maybe you can ask yourself what would be your motivation to confront him.
Me personally I have confronted my BPD mum with it. My motivation for that was not mending our relationship, not perse. I did want to mend it ... .but first of all, I needed to get it all out of my system... I wanted to be taken seriously and I wanted out of the situation where there is a big giant elephant in the room, and everyone is pretending not to see it.
In my case, it has led to the fact that my parents 'broke up' with me. That has caused me quite some pain, but if I were to do it again, I would. I guess your situation is different ... .?