I'll be upfront in saying I never watched many Hepburn movies even though the woman is a legend. Me is a book of stories and I was interested in hearing those stories (read by Kate herself in her unique way). This isn't her biography per se, it's just personal stories from her life. She lived to be 96 so you know she had some stories to tell.
This books covers some of her childhood, Fenwick and growing up in Connecticut. She dearly loved her parents and siblings. In 1921, she found her brother Tom hanging by the rafters. It was presumed an accident but no one knew for sure. Kate also covers her early acting career. One obvious quality of Hepburn is her self-confidence. She never seemed to struggle for parts or self-esteem, even when she was "box office poison".
She saved Spencer Tracy for last. They met filming in 1941, already having known about each other. Tracy was married but Hepburn and Tracy had a complex relationship that lasted until his death in 1967. Listening to her account of time with Tracy, it showed that she put herself aside for the man she loved. The very last part of the book is a letter to Tracy, read with her voice breaking throughout.