"At the behest of the heart" is a classic novel by the French writer Jules Verne, which gives the reader an exciting adventure in the land of fantastic events. In this book, the main character, a young French officer, Francois Dupic, finds himself in a wonderful world where incredible technologies and miracles exist. The adventure begins with Francois receiving a secret assignment from his uncle that takes him on a unique journey through time and space. During his expedition cut off from the ordinary world, he meets incredible characters, goes on the trail of mysterious conspiracies and reveals the secrets of ancient civilizations. In this book, the author successfully combined the elements of an adventure novel, fiction, and detective story, creating an exciting read that will not leave any connoisseur of literature indifferent. "By heart" is a book that will not only entertain you, but also make you think about the big questions of life and the world around us.