Solution

The locations all point to books where they take place, with numbers in the title: Under the Sea = 20000 Leagues under the sea Avoyelles Parish = 12 years a slave St. Louis = Fahrenheit 451 Baghdad = 1001 Nights Sterling, NH = 19 Minutes Jupiter = 2001: A Space Odyssey These numbers are then converted to letters 1=A, 2=B, 26=Z, and then repeating 27=A, 28=B, 57=A 20000 Leagues under the sea = F 12 years a slave = L Fahrenheit 451 = I 1001 Nights = M 19 Minutes = S 2001: A Space Odyssey = Y which gives the answer flimsy.