Thanks for answering. But there are few things I need to ask again

"Let's see what book would fit your taste sounds natural and is frequently used, but why is "would" used?

And why is "As one would wish" is hypothetical?

@lollel123 Because saying "as one will wish" denotes certainty that a person will make a wish. You only would wish if you find yourself in such a situation.

@lollel123 I agree, "lets see what book would fit your taste sounds natural and people do say it. It depends on how certain you are I suppose... if you think there might be other reasons beyond taste why the person would not read the book then it is only hypothetical, in which case they would read the book if [x] condition is true.

"Beyond taste" and other reasons? I think the first and second examples are the same. Is there any difference?

@lollel123 I have updated my answer.

Thank you, now it is more clear. Now I know why i shouldn't use WILL but I still fail to fully understand why WOULD is used especially at(or should i say in?) "as one would wish".

@lollel123 No problem. Once again though, it is because "will" denotes certainty. You are saying "as one might wish" - not saying "you will definitely wish this". Some people might not wish the same way. Hope this clears it up.

So is it like " As one would wish if they wished"?

The IF conditional functions as a tool for making the sentence hyphothetical/not real/will not happen certainly. Am i right?

that isn't really idiomatic.

You don't need "IF" to make a sentence with "would" hypothetical. If a daughter asked her father "would you walk me down the aisle" it goes without saying that could only happen IF she got married.

hello

It is certain that people would wish English to be more easy.