Continuing his interest in racism in the United States, Loewen wrote "", which was released in 2005. The book documents the histories of sundown towns, which are towns where African Americans, Jews, and other minority groups were forced (or strongly encouraged) to leave prior to sundown in order to avoid racist violence threatened and perpetrated by the towns' majority white populations. A review of the book, in the "Washington Post", noted that even though Loewen dedicated an entire chapter to research methodology, his claims regarding the number of communities which supported racial exclusion policies is both widely variable and vague. The review stated "This vagueness, along with Loewen's almost evangelical passion for his material, raises questions of credibility – or at least of potential overstatement." Loewen has written about sundown towns repeatedly throughout his career, including in "Lies Across America", where he notably cited the affluent suburb of Darien, Connecticut as meeting his definition of a modern-day "de facto" sundown town.