The Little Paris Bookshop explores the way literature can act as medicine for the soul. Through Perdu’s practice as a “literary apothecary,” or pharmacist, and through the sub-plot of uncovering Samy as the author of Southern Lights, the novel emphasizes literature’s power to forge connections and to soothe complex emotions.

Perdu’s floating bookshop, the Literary Apothecary, evokes the concept of books as medicine. Perdu sees books as a method for treating “feelings that are not recognized as afflictions and are never diagnosed by doctors” (23). Perdu, and many of the customers who visit his bookshop, sees that books can validate and soothe the many emotions that come with being a human, emotions that aren’t illnesses but that still need attention. “I’ll bring you a book for crying” (10), he tells Catherine when she says that she feels like she needs to cry more to work through her sadness. Just like a pharmacist might prescribe a pill that targets the body’s pain receptors to help someone manage their pain, Perdu prescribes books that target the emotions to help someone cry, laugh, or feel more confident. This practice works. For example, Anna is happier and more comfortable in her own skin after just a little time with the books Perdu prescribed.