Sweet Filthy Boy is the first book in the Wild Seasons series by Christina Lauren. It revolves around Mia Holland, a recent college graduate who embarks on a spontaneous trip to Las Vegas with her friends. There, she meets Ansel Guillaume, a charming and adventurous Frenchman. What starts as a one-night stand quickly turns into a passionate and complicated relationship. The book explores themes of self-discovery, lust, and the challenges of long-distance love.