The 20-year-old single mother is coming up with a 304-page memoir this summer. Bristol Palin, daughter of Sarah Palin, will come out of a memoir that tells about her life of 20 years and how she struggled of being pregnant at 17. The memoir is set to be released on June 21 and Amazon.com has already put it up for pre-order at $17.15. There is still no title for the book, and we are also wondering how she was able to write the memoir when she has been busy the past years. We wonder what else she has written that it took her 304 pages to write her life. We’d like to see what it says when it comes out.