What is a good book cataloger for mac?

Question

Books

I want a book cataloger for Mac, similar in functionality to iTunes.
Requirements:
1) Support for different book formats. Definitely - FB2, all the rest are not so important. But FB2 is a must.
Why: I have a large library in FB2, inside of which there are still txt. I still agree to convert them to fb2, but I will not transfer the entire library to epub for the sake of my native Mac application.
2) Sorting by tags inside the FB2 file.
It is very desirable to have a mode of group editing of tags inside FB2 - series, authors, and so on.
Why: I download several books by the popular writer Lukyanenko. In one, he is described as S. Lukyanenko, in another as Sergey Lukyanenko, in the third - S. Lukyanenko. I want to mark them all and bring the information inside to one form, manually of course. But I really want group editing. Accordingly, I also want the opportunity to press the button and see the presentation of books as tracks in iTunes - first sorting by authors, then by series:

3) Storage inside or the ability to export from your database in the form of a conveniently simple layout in folders within the file system. This is how iTunes stores songs:

Why: today I read a book from an iPhone, the reader of which can only download from dropbox, yesterday I read on an android, the reader of which simply works with folders on a memory card, tomorrow I will buy an e-book, which also understands only the file system without any bases. And I want to use the same library without problems.
In fact, I need not so much the cataloger itself, but a program like Music Tag Editor, which can take FB2 files from the general heap, edit the tags at will and arrange them into folders according to the tags.

Answer 1

Have you looked at caliber ? Even if it's not there, you can search/write a plugin.

Answer 2

You can see MyRuLib ( myrulib.lintest.ru ). Quite an interesting cataloger, there is a version with a built-in CoolReader.