A Brief History of Time – The reference to Stephen Hawking’s book serves to underscore a key idea: that space and time are fundamentally interconnected, forming a four-dimensional space-time continuum [Hawking]. The mention of A Brief History of Time at multiple places in the novel hints at the deeper scientific backdrop underlying the fictional use of the compass as a time-travel device.

Time travel – The idea of time travel has long intrigued scientists and writers, though no scientific foundation exists for the kind of time-travel portrayed in popular imagination. H. G. Wells’s The Time Machine [Wells] introduced the concept of a vehicle moving through time like space, embedding the notion deeply into the fabric of modern storytelling. To the best of my knowledge, no earlier work of fiction has explored the idea of mind travel to the past in manner presented in this novel.