What is the importance of the 'Magic Library' in the novel, The Last Cuentista?

Petra is connected to a new Cog that is supposed to wipe her memories, and this is when she discovers that Ben had created a virtual library in her head. Petra describes the library as having many shelves that emanated from the center, like the spokes of a wheel. There are digital books on each shelf. Because Nyla was trying to erase Petra's memory altogether, many of the books looked damaged. This program included a man who looked like Ben who identified himself as the Librarian.