Karen Green was married to David Foster Wallace, and she's the one who discovered his body after he committed suicide. As Nelson writes in the Los Angeles Review of Books:

The tender things may be painful for Green to remember; due to her crystalline, sincere rendering, they are also painful to read about. Perhaps because this is not the memoir of a couple married for decades — Green and Wallace had been married for but four years at the time of his death — the love here conveyed feels hot, blooming, then disastrously cut short, tragically adumbrated by all the trauma and anger that constitute suicide’s ugly gifts.