Rather than review this myself, I'll quote from someone else's, as I think this sums it up very well:
"Two interleaved narratives, separated by convoluted dream sequences and forbiddingly detailed plans for cut-and-fold paper toys, depict the awkward meeting between a thirtysomething loser and the father he has never known; and, more than 80 years before, the abandonment of the father's own father by his father. The stories are simply drawn, without the gothic shadows and mad clutter of so many graphic novels, but the multiple timelines and digressions twist and slot together to form a structure as complex and improbable as any of Ware's paper toys "for the friendless, the weak of heart and the ignored"..."
Here's the rest of the review.
More on the authors' work here.