The Salt Lake City library system's Sprague Branch has science and mathematics sections that are embarrassing; the lowest quality books for kids looking like they were purchased from Deseret Industries.
One single textbook on calculus and several beat-up Schaum's Outline books is as much real mathematics as you'll find. The science collection is pretty much the same some eye-candy astronomy books, cut-rate children's books, a biography of Einstein (?) and one or two thought-provoking books about the "big questions."
However, there are many, many books on occult subjects, and shelves of novels by authors no one remembers nor really should. When I asked about policy I was told that the library spends its budget on popular, high-turnover books.