The leader who had no title wonderful book

Hi, recently I read one book its wonderful book I feel this is the one best book for who thik about leadership. In that some of the person we fell they connect to our life and also we face same challenges in our life. Author specifically mentioned about thinking mentality and how we can see the situation.
The main purpose of the book was also leader should face challenge and change is needed. We should think about routine and change for growth,main point is learning from the failure and try again and again.
Some of the main points leader should start is continuous trying mindset and listening skills should improve.He told about new way of thinking mentality and also give proper training for the mind.
The major important of Leadership skills is improve our own challenges then only we can improve our team. Team handling and increase our team spirit.
I feel this book gives proper vision for Leaders.