Forty-five figures, each more famous than one another, wrote letters to their thirties... We all think about the past from time to time, and question our own lives.; we account for what we have done, or failed to do, for our successes, or failures. The things “I wish I could” and “I’m glad I did” mingle. In Letters to Thirties, forty-five figures, each more famous than one another, wrote letters to their thirties... They not only took account of their lives, but also shared their experiences with, and gave advices to today's youth alongside their own youth. Just as Meri Istiroti, the author of Letters to Thirties, which serves as a guide for all young people throughout their journeys of life, says: "In this book, there are precious experiences gained, achievements accomplished, and mistakes made to reach the top.... Even if they do not happen to us, we can move along our paths of life more consciously by reading these experiences."