Reviewed by Steven.G. Kellman             “Writing,” according to Domenico Starnone, “is a combination of eros and exhaustion.”  Eros asserts itself in the opening pages of The Mortal and Immortal Life of the Girl from Milan, the sixth Starnone book translated from Italian into English. Eight-year-old Mimi is infatuated with a pretty girl who lives across from his family’s fourth-floor apartment …