The American Roommate Experiment is the follow-up to The Spanish Love Deception and focuses on Rosie, a character introduced in the first book. When Rosie’s apartment is being renovated, she ends up staying with Lucas, a quirky and charming writer who also happens to be her new roommate. As they navigate living together, their growing attraction leads to unexpected sparks. This book continues Armas’ tradition of enemies-to-lovers, with humor, heart, and a mix of personal and romantic growth.