Desiree Reads asked Catherine Wallace Hope:

How did you delve into a complicated subject matters like quantum mechanics and spacetime theory and translate into easily digestible content for the reader? (Well done, by the way!)

Catherine Wallace Hope Thank you, and thanks for this question. The story's starting point was a dream I had, and when I began looking into how to make it into a novel, I knew I had to contend with the linear concept of irreversible time. I’m from Colorado, and I was aware that some of the most precise time technology on the globe was developed in Boulder at the National Institute of Standards and Technology. That’s where I found the earliest pieces of the puzzle. As I worked on the story, I kept reading about quantum mechanics—A LOT. :) There were some beautiful moments of synchronicity when facts dropped into view, small golden nuggets that I wouldn’t have known to look for otherwise. I think the astrophysicist whose writing meant the most to me was Carlo Rovelli; his passionate and lyrical work is the basis for the time science in the novel. Fortunately for me, both my agent and my editor encouraged me to make the concepts translate more readily, to emphasize the parallel between what Zac observes and what happens to Erin—and, in the end, what could conceivably happen to any of us.

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