We have a library collection profile on file with YBP (Yankee Book Peddler) that determines the selection of books and notifications that we receive. The approval profile also drives our DDA (demand-driven acquisitions) plan. It is arranged by LC Classification, and each specific range of numbers is noted B (send Book), S (send Slip), or X (no book, no slip). Many non-subject parameters also inform the selection, such as language, format, or academic level. The profile is reviewed and edited annually by the librarians, faculty liaisons, the Head of Collection Development, and YBP representative. You can see the full plan at the link below. Log in to YBP and look under the Library tab.