"Pain Is Inevitable but Misery Is Optional" is a book written by Barbara Johnson, focusing on the idea that while pain is a part of life, misery is a choice. The book, released in 1990 in the United States, encourages readers to find ways to overcome obstacles and make positive changes in their lives. The title serves as a reminder that despite the challenges we face, we have the power to choose whether or not to let them lead to misery.