In her new masterpiece, the author of the bestselling phenomenon Quiet reveals the power of a bittersweet outlook on life, and why we’ve been so blind to its value.  “Bittersweet grabs you by the heart and doesn’t let go.”—BRENÉ BROWN, author of Atlas of the Heart“Susan Cain has described and validated my existence once again!”—GLENNON DOYLE, author of Untamed“A sparkling ode to the beauty of the human condition.”—ADAM GRANT, author of Think Again ONE OF THE MOST ANTICIPATED