It would depend on the type of library. Is the West Point library a special library or public base library? It isn't necessarily censorship. It may be because the book doesn't fit into the mission of the library. Libraries have to be selective of materials especially when it comes to available space in the collection. If it isn't pertinent to the collection or the library's mission, it will most likely not be added to the collection. Collection development specialists make this decision based on policies as well as readership needs.