How do you view the size of your Ibook library? How do you view how many books are in your library?

When all of the ebooks, pdf's etc were located in itunes I could see that I had 453 books and the size of the library was 5 GBs. Now in the Ibook app I can no longer see or view this information. Also in Itunes you could modify the Author, Catagory, Title etc. in Ibooks you can't, You also can't use "show in finder" to see the actual file and library. If any of you know how to do these things please explain it to me?