【Author's Intent】 This book provides concrete advice for people in their 30s to avoid wasting their lives. The author states that 90% of life is determined in these 10 years, encouraging readers to live without regrets. 【Summary of Contents】 This book details methods for addressing the unique challenges of people in their 30s, including work, relationships, money, habits, and ways of thinking. In particular, it introduces specific approaches to self-improvement and building relationships. 【Target Audience】 This book is perfect for people in their 30s and those who are struggling with the direction of their lives. It is packed with tips for making life better. - Title: Don't Waste Your 30s - Author: Shigehisa Nagamatsu - ISBN: 978-4-86663-093-9 - Price: 1500 yen - Contents: Thoughts and habits necessary for people in their 30s - Number of pages: 380 pages Thank you for viewing.