Love, Z by Jessie Sima

From the creator of Not Quite Narwhal comes the story of a young robot trying to find the meaning of ""love.""When a small robot named Z discovers a message in a bottle signed ""Love, Beatrice,"" they decide to find out what ""love"" means. Unable to get an answer from the other robots, they leave to embark on an adventure that will lead them to Beatrice- and back home again, where love was hiding all along.