"Equation for Time" by R. R. Winterbotham is a science fiction novel written in the early 21st century. Set in a future where horses have become extinct and time travel is theoretically possible, the story follows Dr. Fred Huckins, a surgeon who becomes embroiled in a plot involving the brilliant physicist Trella Mayo and the menacing Gustav Keeshwar. The novel explores themes of time, science, and the ethical dilemmas surrounding technological advancements. The narrative begins when Huckins encounters Keeshwar, who offers him a million dollars to perform a dangerous operation on Trella Mayo, a scientist on the verge of a groundbreaking locomotion invention. As threats against her life emerge, Huckins learns about Trella's creation of a machine called the "space-time translator," designed to transport objects through time and space. When an attempt on Trella's life results in her becoming physically split between two points in space-time, Huckins races against time to reunite her halves using mathematical principles of time travel. The story culminates in their successful reunion and poses philosophical questions about time and existence, presenting a blend of intrigue, romance, and speculative science. (This is an automatically generated summary.)