That Was Then, This Is Now is a coming-of age, young adult novel by S. E. Hinton, first published in 1971. Set in the 1960s, it follows the relationship between two brothers, Mark Jennings and Bryon Douglas, who are foster brothers, but find their relationship rapidly changing and deteriorating. The book was later adapted into a 1985 film starring Emilio Estevez and Craig Sheffer. Source: Wikipedia (en)