The House of Mirth
The central theme of "The House of Mirth" is essentially "the struggle between who we are and what society tells us we should be". Thus, it is considered by many to be as relevant today as it was in 1905. If its sole subject had been the excesses and lives of the rich and famous, by themselves, it is doubtful it would have remained popular for as long as it has. "The House of Mirth" continues to attract readers over a century after its first publication, possibly due to its timeless theme. That the life and death of Lily Bart matters to modern readers suggests that Wharton succeeded in her purpose: to critique "a society so relentlessly materialistic and self-serving that it casually destroys what is most beautiful and blameless within it."
Mort
Mort and Ysabell travel into the Stack, a library in Death's domain that holds the biographies of everyone who has ever lived, in order to investigate Albert, eventually discovering that he is indeed Malich. They further learn that Malich had feared monsters waiting for him in the afterlife, and performed a reversed version of the Rite of AshkEnte in the hope of keeping Death away from him. However, the spell backfired and sent him to Death's side, where he has remained in order to put off his demise. During this time, Death, yearning to relish what being human is like, travels to Ankh-Morpork to indulge in new experiences, including getting drunk, dancing, gambling and finding a job. Mort in turn starts to become more like Death, adopting his mannerisms and aspects of his personality, while his own is slowly overridden.