Irish playwright Sheridan returns to the same themes of his debut memoir, 44: Dublin Made Me, further exploring his childhood, family and city. The plot focuses on a complex ménage à trois between his parents and a British woman named Doris, a relationship that spanned 47 years and two countries. Intriguingly, this plot is never resolved: the deeper Sheridan explores, the more elusive the characters and their motivations become. He does not unearth Doris's intentions nor does he delve into why his mother, Anna, allowed another woman in her marriage. Sheridan approaches these mysteries with a combination of temerity and timidity: he'll ask Doris why she used contraceptives when she slept with his father yet shy away from confronting his mother with similar personal questions. Sheridan thus creates a joyfully uneven experience, leaving readers to discover the small details gradually, the entire story never revealed until the very end. The narrative proceeds primarily through Sheridan's own flashbacks or through long, italicized segments delivered in first person by Anna or Doris. These segments, though sometimes cumbersome and detached from the main narrative, provide the reader not only with shifting points of view, but also with rich Irish and British vernacular. Sheridan's secondary characters are the members of his extended family, including his alcoholic aunt and uncle from Australia. Another key character is the city of Dublin, with its songs, customs and politics. Although at times burdened by excessive sentimentality, Sheridan does succeed in conveying an Irish atmosphere and the more worldly issues of fidelity, betrayal and unrequited love. (On sale July 1)