"Seventy-two letters" is a science fiction novel written by British author Ted Chandler. In this book, readers find themselves in an alternative Victorian England, where magic is combined with scientific discoveries. The main character, Joe Laclow, a cabalist scholar, studies magical symbols that affect people's lives and consciousness. During his research, he stumbles upon a secret that could change his view of the world even more than he imagined. The author has successfully combined fantasy elements with philosophical considerations, creating an exciting and dizzying world that will leave readers wondering about the essence of magic and science."