Books Unknown Friends by Carl Dennis Paperback, 75 pages, Penguin Group USA, List Price: $18 | purchase close overlay Buy Featured Book TitleUnknown FriendsAuthorCarl Dennis Your purchase helps support NPR programming. How? Amazon Independent Booksellers Book Summary From the Pulitzer Prize-winning author of Practical Gods comes a tenth compilation of poetry that explores the themes of separation and connection and of what it means to be a part of larger community. Original. Genres: Poetry Facebook Twitter Flipboard Email NPR stories about Unknown Friends Poetry 'Thanksgiving Letter from Harry' April 30, 2007 Carl Dennis is the artist in residence at SUNY at Buffalo. "Thanksgiving Letter from Henry" is a poem from his most recent book, Unknown Friends, which will be released in April by Penguin.