Fitzgerald’s other novels did not sell as well as his first novel while he was alive. He and Zelda spent a lot of money on parties and Fitzgerald had to try and make money by writing short stories. In the late 1920s, Fitzgerald started working on a fourth novel, but problems arose when Zelda’s mental health got worse. The fourth novel, "Tender is the Night", was not published until 1934. Some people say that the characters in the novel are very similar to Fitzgerald and Zelda themselves. "Tender is the Night" did not sell as well as "This Side of Paradise" in Fitzgerald’s lifetime, and a number of critics said it was poor. The book is now considered to be one of Fitzgerald’s better works, however.