<P> Ellis researched murders at the New York Public Library . His first draft of American Psycho left all the grisly scenes until last, to be added in later . In 2010, in conversation with Jeff Baker, Ellis commented: </P> <Table> <Tr> <Td> "</Td> <Td> (Bateman) was crazy the same way (I was). He did not come out of me sitting down and wanting to write a grand sweeping indictment of yuppie culture . It initiated because of my own isolation and alienation at a point in my life . I was living like Patrick Bateman . I was slipping into a consumerist kind of void that was supposed to give me confidence and make me feel good about myself but just made me feel worse and worse and worse about myself . That is where the tension of American Psycho came from . It wasn't that I was going to make up this serial killer on Wall Street . High concept . Fantastic . It came from a much more personal place, and that's something that I've only been admitting in the last year or so . I was so on the defensive because of the reaction to that book that I wasn't able to talk about it on that level . </Td> <Td>" </Td> </Tr> </Table> <Tr> <Td> "</Td> <Td> (Bateman) was crazy the same way (I was). He did not come out of me sitting down and wanting to write a grand sweeping indictment of yuppie culture . It initiated because of my own isolation and alienation at a point in my life . I was living like Patrick Bateman . I was slipping into a consumerist kind of void that was supposed to give me confidence and make me feel good about myself but just made me feel worse and worse and worse about myself . That is where the tension of American Psycho came from . It wasn't that I was going to make up this serial killer on Wall Street . High concept . Fantastic . It came from a much more personal place, and that's something that I've only been admitting in the last year or so . I was so on the defensive because of the reaction to that book that I wasn't able to talk about it on that level . </Td> <Td>" </Td> </Tr> <P> Set in Manhattan during the Wall Street boom of the late 1980s, American Psycho follows the life of wealthy young investment banker Patrick Bateman . Bateman, in his mid-20s when the story begins, narrates his everyday activities, from his recreational life among the Wall Street elite of New York to his forays into murder by night . Through present tense stream - of - consciousness narrative, Bateman describes his daily life, ranging from a series of Friday nights spent at nightclubs with his colleagues--where they snort cocaine, critique fellow club - goers' clothing, trade fashion advice, and question one another on proper etiquette--to his loveless engagement to fellow yuppie Evelyn and his contentious relationship with his brother and senile mother . Bateman's stream of consciousness is occasionally broken up by chapters in which he directly addresses the reader in order to critique the work of 1980s pop music artists . The novel maintains a high level of ambiguity through mistaken identity and contradictions that introduce the possibility that Bateman is an unreliable narrator . Characters are consistently introduced as people other than themselves, and people argue over the identities of others they can see in restaurants or at parties . Deeply concerned with his personal appearance, Bateman gives extensive descriptions of his daily beauty regimen . The question of whether any of the crimes depicted in the novel actually happened or whether they were simply the fantasies of a delusional psychotic is only perpetuated further by the cinematic adaptation . </P>

What is the meaning behind the movie american psycho
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