The one-paragraph version: Belle de Costa Greene is a light-skinned black woman who is passing as white. She gets a job as J. P. Morgan’s personal librarian for his newly constructed Pierpont Morgan Library in 1906. Over many years, she works to acquire and curate J. P. Morgan’s collection of rare and ancient works and art, and she eventually becomes indispensable to him, even required to attend family events. They have a mutual attraction, but she decides against pursuing it. When Mr. Morgan passes away in 1913, he provides for Belle in his will, and she stays on as librarian. The book ends with Belle successfully convincing Jack (J. P. Morgan’s son) to make the library public in the early 1920’s.The Personal Librarian: Recap & Summary
Spoiler alert warning.