Strategy and business design
Most of my business design studies come from Roger Martin.
IDEO's design thinking process example. Inspiration for the strategy approaches.
What Is Business Design and How Do I Become a Business Designer?
Service Design for the Real World: A Practical Introduction
Use Customer Journey Maps to Uncover Innovation Opportunities
Creating Great Choices - A leader’s guide to Integrative thinking
The Creative Act: A Way of Being
Negotiation Genius: How to Overcome Obstacles and Achieve Brilliant Results at the Bargaining Table and Beyond