Free Kindle Book for Amazon Prime Members

I don't have a kindle and I'm not planning on getting one, but lots of my friends have them, so this note is for them.  I previewed a book online that I am planning on purchasing.  I noticed that the kindle version is free for Amazon Prime members.  The books title is Uncommon Beauty: 7 Qualities of a Beautiful Woman by Cynthia Heald.  I have been deeply encouraged by Ms. Heald's Bible studies.  I haven't read this book, but I did read a portion online and enjoyed it.