How can we generate creative and rich ideas out from the different source of information from the books, magazines, and in the Internet?

  this riddles' answer is library.

  the "leaves" are a reference to the books' pages that the library contains; the branches are a network of libraries that connect multiple libraries' collections, resources, and items in a system of a common database, integrating them; the branches' organization are a useful management tool for coordinating the multiple collections many libraries have.

c. "but thy eternal summer shall not fade" (line 9)