He smelled of a thousand secret worlds, of rabbit-holes and hidden doorways and platforms nine-and-three-quarters, of Wonderland and Oz and Narnia, of anyplace-but-here. He smelled of yearning.
The librarian makes a well thought out and descriptive way to tell the reader of the yearn for knowledge the boy has (In reference to the boy in the red hoodie) . I picked this example specifically because the author uses many descriptive words not only here but throughout the book. It allows for the reader to feel the emotion coming from the passage and at least for me made for a way more enjoyable and colourful reading experience.