Here's why we don't know:
* Privacy: Authors have personal preferences, and it's not always shared publically.
* Focus on her own work: Authors often get asked about their own books and writing process.
* Shifting tastes: People's favorite books can change over time.
Instead of focusing on a single book, perhaps consider:
* Exploring her own writing: Read some of her books to get a sense of her literary style and interests.
* Looking at interviews: Some interviews might offer insights into her favorite authors or genres.
* Consulting her website or social media: She might have mentioned a favorite book in a recent post or article.
Ultimately, you can find books you love without knowing the specific favorites of others. Happy reading!