Erma Bombeck Boxed Book Set of 4 Hilarious Bestsellers 1970s comedy author VTG

Boxed set of 4 books ~ "Four Hilarious Bestsellers" by late author Erma Bombeck At Wit's End 1967 I lost everything in the post-natal depression 1973 Just wait till you have children of your own 1971 The Grass is Always Greener Over the Septic Tank 1976 Some yellowing or discoloring of the book pages, but no writing, rips or tears. Box has some wear to it, a few creases and tears on the corners. Overall good condition for age of 40 years! Please see all photos.