The Tortilla Curtain (1995), a novel by T. Coraghessan Boyle, juxtaposes the existence of southern California's affluent whites and non-white underclass by relating the stories of two couples whose lives become irrevocably entangled following a fateful automobile accident. The period flavour derives from racial tensions that culminated in the Los Angeles riots of 1992 and the passage, two years later, of Proposition 187, a package of prohibitive measures to curb the influx of “undocumented” immigrants from Mexico. Delaney Mossbacher, the book's main character, is a freelance nature writer with orthodox liberal views – a caricatured Sierra Club member. He contributes a monthly, Annie Dillard-esque nature column (“Pilgrim at Topanga Creek”) to an outdoor magazine. He lives in an upscale hilltop community designed in impeccable Spanish mission style – the product of white flight – apparently safe from the Mexican hordes that have broken through the border (the brittle “tortilla curtain” of the novel's title) and are overrunning the flatlands.