About to graduate from high school Lottie is mourning the death of her favorite aunt (Helen) a famous children's book author. Aunt Helen's books are about a pair of immortal siblings (Alvin and Margo Hatter) and are wildly popular among people of all ages. There are of course those who do not like her books "the Anti-Hatters [who] burn the books on YouTube...They say the idea of immortality is a sin against God".
Aunt Helen donated half of her estate to "various charities and libraries of her choosing". She clearly understands the importance of libraries to authors. Some authors seem to think that libraries are somehow stealing royalites from them.
Aunt Helen also had owned the "most expansive private library" of anyone Lottie knew. Helen was even "featured on the front page of Libraries International twelve separate times". Lottie is emphatic in her instance that "Libraries International was an actual magazine". I, however, could find no evidence that such a magazine exists.
We don't actually see much of Lottie using the library although she does meet her friend Sam at one. Sam travels a lot and tells her that he gets a library card wherever he goes "that's important" he tells her.