"People We Meet on Vacation" is a contemporary romance novel by Emily Henry. The story follows two best friends, Poppy and Alex, who take annual summer trips together. However, after a falling out, they haven't traveled together for two years, prompting Poppy to suggest one last vacation to mend their friendship. As they embark on their journey, Poppy and Alex confront their feelings for each other while navigating various adventures and challenges. The novel explores themes of friendship, love, and self-discovery, ultimately highlighting the importance of taking risks in relationships.