possible current result of possible past event

Question

I want to express a possible result of an action that might have been carried on in past, but I don't have any idea whether the action is done or not. Consider this sentence:

If you'd read the book, you would know what I mean..

Given the fact that I have no idea whether the listener has read or hasn't read the book, does this construct work?

I want to imply:

1. This is a strong condition, and I'm sure if the action is done, the result holds true.
2. I have no idea whether the action is done or not, and I don't want to express It's unlikely that you have read the book. In fact, there is a high chance that listener has read the book.

My inclination is if I remove would in result sentence, it might feel better:

I you'd read the book, you know what I mean..

However, no mixed-conditional that I've found mention the last construct.

Update:

After more search, I come to this construct:

If you've read the book, you know what I mean

I think the use of present perfect is more natural and may suggest that this action is possible. Does it? Anyway, I don't know in which conditional categories this falls into.

Answer 1

The past perfect in "if" clauses indicates a counterfactual condition: "You didn't read the book but if you had read it..."

For conditions that may or may not be true, a present perfect condition can be used, and so use "will" in the conclusion.

If you've read the book, you'll know what I mean.

And you'll not find this on the list of zero/first/second/third conditional... again this indicates the limited used of this analysis of conditional sentences in English.