Writing a book

I’ve always wanted to write a book about my life. But I never kept a steady journal so it would be all from my memories. I recently started going through my late sister’s journals and she wrote that she wanted to write a book about her life and use her journals for reference. I think I want to make her dream come alive. With tears in my eyes I have read a lot of her handwriting and I feel in my heart that this is what I need to do.