A NEW YORK TIMES BESTSELLER FINALIST FOR THE 2022 NATIONAL BOOK AWARD FOR NONFICTION "Remarkable." -Andrew Solomon, The New York Times Book Review "At once a rigorous work of scholarship and a radical act of empathy."-Esquire "A ray of light into those isolated cocoons of darkness that, at one time or another, may afflict us all." -The Wall Street Journal "Essential."-The Boston Globe A landmark exploration of one of the most consequential and mysterious issues of our time: the rise of chronic illness and autoimmune diseases A silent epidemic of chronic illnesses afflicts tens of millions of Americans: these are diseases that are poorly understood, frequently marginalized, and can go undiagnosed and unrecognized altogether. Renowned writer Meghan O'Rourke delivers a revelatory investigation into this elusive category of "invisible" illness that encompasses autoimmune diseases, post-treatment Lyme disease syndrome, and now long COVID, synthesizing the personal and the universal to help all of us through ...