I somehow found a paper bookmark publicizing this amazing independent bookstore in Venice. Because the city periodically floods, the books are kept in bathtubs or even boats (a gondola, in one photo I've come across). In the photo on the bookmark, the owner, whose name I believe is Luigi Frizzo, is wearing Wellington boots.
There are many beautiful bookstores in the world, especially in Italy, but this one is special without a doubt. I don't believe they have a website, but you can follow them on Facebook ((Libreria Aqua Alta) and Instagram (@libreriaacquaalta). Would I love to visit!