Clue: 15 story in righteous Bible entry mistaken about love (7,2,6)
Answer: GOODBYE TO BERLIN
Explanation: 15 story in righteous Bible entry mistaken about love (7,2,6)
**GOOD** ("righteous") + *(bible entry) *about* **O** ("love") 
*"Goodbye to Berlin" was Isherwood's most famous book, later adapted for the movie, "Cabaret"