Her second book, Furiously Happy, was released on September 22, 2015.[15] It is a humorous look at Lawson's experience with depression and anxiety disorder, and it debuted in the number 3 spot of New York Times Bestseller list on October 11, 2015. It reached number one on the New York Times Bestseller list on July 3, 2016.[16]
The title refers to Lawson's philosophy of being "furiously happy" after becoming so depressed that she eventually decided to force herself to be happy out of frustration and spite, driving herself to adventures and experiences in order to build happy memories to sustain her through bouts of depression. This propels her to do such things as travel to Australia in order to hug a koala while wearing a koala suit, to wear a fancy ballgown on ordinary occasions in order to feel beautiful, and to connect with people in the real world in spite of painful physical ability and severe social anxiety. She also related experiences of other mentally ill people who have gone on their own adventures after being inspired by her.
