Welcome back, chay.  
You ask a great question, and fortunately there is a lot of rather new books and articles available.
Here are a few to help your friend get started:
The website 
A mighty GIRL has a post with 
A Different Way of Thinking: 30 Books About Autistic Mighty GirlsAn interesting reading list of 
Books About Autism in Women (My 2021 Reading List)[/color][/i].  
The amazon page for this book,
Women and Girls with Autism Spectrum Disorder: [color:#999999][i]Understanding Life Experiences from Early Childhood to Old Age, has other links to follow.
This review of the book, 
I Can Fix It!, has other links to follow.