Maus by Art Spiegelman

picture by Ardesia.

From wikipedia:
Maus: A Survivor's Tale is a memoir by Art Spiegelman, presented as a graphic novel. Parts of the story were originally published in the magazine RAW between 1980 to 1991. The complete story was published in two volumes: the first in 1986 ("My Father Bleeds History") and the second in 1991 ("And Here My Troubles Began").

In 1992, it won a Pulitzer Prize Special Award. All people are presented as anthropomorphic animals (for example, all Jews are depicted as mice, hence the name Maus which is German for "mouse"). The New York Times described the selection of Maus for the honor: "The Pulitzer board members ... found the cartoonist's depiction of Nazi Germany hard to classify."

From amazon:
A son struggles to come to terms with the horrific story of his parents and their experiences during the Holocaust and in postwar America, in an omnibus edition of Spiegelman's two-part, Pulitzer Prize-winning best-seller. 25,000 first printing.

You can buy this great graphic novel via this link.
You can download and read it here