Can't print title of book in a view of book pages

Steps to reproduce:

1. create some books (Book1, Book2, Book3)
2. create some pages for every book (Page1, Page2, Page3)
3. create a view of Content with filter criteria Content type (= Book page) and field to display Content: Title.

Now I need to print the book title next to the content title:

Page1 Book1
Page2 Book1
Page3 Book1
Page1 Book2
Page2 Book2
etc..etc..

I tried adding the relationship with "Top level book - The book the node is in." but still can't find a field to add which contains the book title, I just have:
Depth - The depth of the book page in the hierarchy;
Page has Children - Flag indicating whether this book page has children
Weight - The weight of the book page.

Any help will be appreciated.

Thank you