Why Did Pete Duel Kill Himself?

Pete Duel, an adult, appeared to have everything. And yet he still chose to end his life. The question of why haunts young Alex Kalienka and serves as the bookends to a series of vignettes that highlight Alex's youthful trials. Alex--inexplicably portrayed with a dog's head--has a rough childhood, and you feel for him. But really, his life doesn't seem any rougher than most kids. Alex hopes that adulthood is easier, but Pete's decision suggests otherwise. Unfortunately, the reader is left to infer this conclusion as Mark Kalesniko's story (such as it is) is light on theme (other than childhood misery) tying these disparate narrative events together.