The Tao of Coaching by Max Landsberg is an excellent book about coaching as a leader. The tagline on the book says Boost your effectiveness at work by inspiring and developing those around you which sums up coaching from the leaders perspective.
The books is described like this:
This book offers information on how to unlock the potential of people by applying the techniques of coaching. Coaching is the key to realising the potential of your employees, your organisation and yourself.
This book provides the techniques and tools of coaching that are vital for those who want to develop a team of people who will perform effectively and who will relish working with them.
The techniques and tools of coaching are integrated in the story about Alex and his career as manager. That makes it easier since you see them used in context.
The book lists these reasons why a manager shall use coaching:
• Create more time for yourself
• Achieve better results
• Build your interpersonal skills
If you want a great introduction to coaching as a leader, and a book you later can use as manual, I suggest that you buy The Tao of Coaching.