Groff's writing is well-done, though it took me some getting used to. In Fates and Furies she presents an examination of a marriage, first from the POV of Lotto, the husband, and in the second half of the book, from the POV of Mathilde, his wife. I agree with my friend Chris (thanks for the recommendation!) that the first part if fairly slow. It even slogged at some points for me, though maybe if you're a huge fan of the theater scene you would feel differently. 
 Nothing in Mathilde's story shocked me, but some things did surprise me. Mostly I was enthralled by learning her background and discovering she is not the person Lotto believed her to be. This book explores what makes a marriage work. It delves into our motivations, whether pure or shamefully ugly. It shows the things that we don't want anyone to know about ourselves. 
 Some things feel disjointed, super strange, and slightly out of character, but in the end Groff's writing made me not care about those minor quibbles.