Title: Tegami bachi
Description: "Searching for the truth about Amberground, Lag heads home to the little town of Campbell. There, a woman named Sabrina Mary holds the secrets he seeks. But can he handle what he learns about his world, his government-- and his own mother?" -- from publisher's web site.
Subjects: Letter carriers, Mothers and sons, Comic books, strips, Comics & graphic novels, manga, science fiction