In theory, this is love

• The New York Times bestseller
• Goodreads Choice Award Nominee for Best Novel (2023)

Jack Smith has a superhero jaw, cute dimples, and handsome arms with massive biceps that both annoy and appeal to Elsa. He is a sharp-tongued, charismatic and self-confident young man who does not take his eyes off his brother's girlfriend, whom he does not trust at all. And for good reason. After all, Elsie is not a librarian, but a physicist with a doctoral degree. During the day, she works in a laboratory, and in the evening she goes on dates with a fake boyfriend for money.

But the worst thing is that Jack is an experimental physicist who mercilessly destroyed the career of his mentor and almost the entire scientific industry. For this Elsie has hated him since the age of twelve and intends to make life unbearable for this piece of space junk when they work together at MIT.

But will the avenger get her dream job if the final decision will depend on Jack? And what will she do when the distance between her and her sworn enemy closes to a kiss?