Lydia Slaby discusses her book, “Wait, It Gets Worse,” on Tuesday, Sept. 24, starting at 7 pm, at the Edgartown library. Slaby was 30 years old and thought she had everything going for her, but then she was diagnosed with lymphoma, and her illusion of control was shattered. Slaby will speak with irreverence and sharp humor about how she made it through her situation.