Gleick assumes that his readers are interested in learning more about time.
He begins the book by acknowledging that time is a complex subject that has been pondered by philosophers and scientists for centuries. However, he also argues that time is something that we all experience on a daily basis, and that it is therefore important to understand it as best we can.
Gleick assumes that his readers are open-minded to different perspectives on time. He does not present a single, definitive view of time, but instead explores a variety of different perspectives, including the views of philosophers, scientists, and artists. He also encourages his readers to consider their own personal experiences with time.