The Personal Librarian by Marie Benedict

 Belle Greene was JP Morgan's personal librarian, consultant, advisor, companion--and she was a Black woman hiding in plain sight as a white woman. This book is a fictionalized account of her life. It's a fascinating story of how she convinced Morgan to hire her based on her experience at the Princeton Library and soon became the only woman in a man's world of purchasing priceless manuscripts and artwork. The book also details her  off and on again relationship with married art expert Bernard Berenson. A compelling read.