Many would recommend Joan Didion's classic The Year of Magical Thinking for any kind of grief-related ailment, and I second that emotion. There's also a random, little-known book I stumbled on a few years back that helped me immensely when I was trying to come to terms with my father's impending death from cancer. It's called If the Spirit Moves You, and it's the memoir of a journalist, Justine Picardie, who goes on a quest to discover whether there's an afterlife when her sister dies of breast cancer in 2000. Picardie meets a bunch of fascinating people (mediums, psychics, spiritualists, et al) and hears some crazy things. Her writing is lovely, and sometimes heartbreaking -- but all in all, super-comforting, cozy and warm, like a cup of milky tea for the tired soul.