"Tell The Machine Goodnight" by Katie Williams was an excellent speculative fiction book. At the center of the book is a machine that tests your DNA and tells you what you need to do to be happy. The book runs with that idea. It reminded me of the movie "HER" mixed with an episode of Black Mirror. The story is a fragmented narrative from various character perspectives that paints a vivid picture of a future society. While this society has new tools to aid in its pursuit of happiness, they are just as clueless as we are now. I loved the interesting characters and intriguing stories. To say any more would be to spoil the fun. This is a delightful, inciteful book that will make you think.