On its surface, “The Farm” by Joanne Ramos is a faintly dystopian tale about the capitalistic imperative to build markets for the most intimate of human goods: babies. But not just off-the-rack babies. Joanne congers a luxury market for organically grown, non-toxic, Mozart-steeped, meticulously incubated, designer infants — all produced by surrogate mothers in a spa-like retreat in New York’s Hudson Valley.