Marge denotes the similarity of the picture behind the couch to the classic novel, Moby-Dick (the picture is, in fact, called "Scene from Moby Dick"). It inspired her novel, when she thought "No one's done a book about whaling before!" Moreover, her book is about whaling and its ending has Temperance's husband dying in a similar manner to that of Ahab, from the same novel.
This episode never explains how Homer got his job back at the Nuclear Power Plant.
Before seeing the ambulance at the used car garage, Homer plugs in an inflatable character that rips and flies away. The wires are clearly visible going all the way to the podium. Homer laments having lost his best friend. He stands on the podium. The wires are nowhere to be seen.
When Marge is typing she puts that seven of Temperance's children died meaning three would be in the kitchen scene. However in the kitchen only two (Bartabe and Lisakiah) are their desperate there should be three. However at the end of the book Cyrus says that Temperance is pregnant hinting that another child.
When Lisa says that the book is harsh on Homer she takes the last page of the off and it reads that Mordecai drooled at the blowholes. However the page should have read about the deaths of Mordecai and Cyrus instead.
When Homer is reading the book, he says, "Temprance Barrow was heavy with feeling. She "snore"..." but when he is listening to it, it says Temprance Barrow was heavy with feeling. Her" The goof is that Homer says She, but the Olsens say Her at the beginning.