The book ‘Happy Doomsday’ is written by David Sosnowski. It is a post-apocalyptic novel. The story is about three young misfits, Dev Brinkman, Lucy Abernathy, and Marcus Haddad, in the wake of an inexplicable event that leaves only a handful of survivors. The book analyzes their challenges of post-apocalyptic subsistence, survivor’s guilt, and the task of rebuilding humankind.