"The Einstein See-Saw" by Miles J. Breuer is a science fiction novel written in the early 20th century. The story revolves around themes of relativity and the manipulation of space, exploring speculative concepts through the journey of its characters. It engages with the scientific ideas of tensors and the nature of matter as they encounter strange phenomena related to dimensions. The plot centers on Tony Costello, a disillusioned engineer turned criminal, who inadvertently becomes embroiled in a series of mysterious safe disappearances linked to a groundbreaking scientific experiment by Professor Bloomsbury. When reporter Phil Hurren and Ione Bloomsbury, the professor's daughter, seek to uncover the truth, they are drawn into a perplexing hyperspace adventure after confronting Tony. Their encounter leads to them being marooned in this alternate dimension, where they navigate bizarre landscapes and grapple with the consequences of their situation. Ultimately, their ingenuity in leveraging the principles of space allows them to regain control and confront Tony, revealing the underlying connections between his actions and the wider phenomena they had been investigating. (This is an automatically generated summary.)