Thank you much for your concern!
but, again (I feel I have to improve my explanatory skills )... as a result, I want to achieve the following:
1) Contents view:
Book_1
Page_1_1
Page_1_2
2) Main body: on selecting "Book_1" from the TOC, the user can see the Book_1 topic text + something like In this topic section, listing the Page_1_1 and Page_1_2 names with hyperlinks.
PS: I just want these three topics to be opened separately (not as one topic), but with the possibility for the user to reference to the subtopics from the main one