"Lift not the painted veil which those who live call Life." 
 Or if you enjoy the sensation of having your heart brutally ripped out of your chest might I humbly suggest, The Painted Veil by W. Somerset Maugham. 
 At the age of 25, Kitty decides to marry Walter Fane, a bacteriologist who comes off as shy and reserved but loves her deeply. Her reason behind marrying Walter? She wants to be married before her younger and less pretty sister, Doris. 
 Walter would go to hell and back just to make Kitty happy but sadly his efforts are in vain. Kitty strikes up an affair with Charles Townsend, an Assistant Colonial Secretary. He is everything her reserved husband is not. Walter finds out about the affair and offers Kitty a deal that could quite possibly cost them their lives. 
 I don't think I've ever felt so helpless or hopeful while reading a book. The Painted Veil is wonderfully written and you come to care about Kitty even though she is in absolute denial for a good portion of the book. She grows and learns from her mistakes making her a relatable character. As she grows, Kitty becomes more aware of her husband and the little things that make him anything but ordinary. I wish I could say more because this book changed me and frustrated me beyond all reckoning but I won't because of spoilers...