Why might Art be so interested in making a story about his Father’s life during the war?

In Chapter 1, we learn that Art - both the author and the narrator of Maus - wishes to draw a book about his father's experiences during the Holocaust. Throughout the book, we are subjected to the author's continuing obsession with the Holocaust: he feels that it has affected - and continues to affect - almost every aspect of his life. At various times in the story (notably in Book II, Chapters 1 and 2), Art tells us that this obsession existed even as a child. As described later in the story, much of this obsession stems from Art's feelings of guilt over having avoided the horrible events that both of his parents lived through. The opening prologue is the only part of Maus that shows Art during his childhood, and from this short scene, we can begin to see exactly why it is that the Holocaust plays such a dominant role in his psyche.