Highly rated but with minimal community notice.

Outside In: The Power of Putting Customers at the Center of Your Business Harley Manning, Kerry Bodine
Service Design for Business: A Practical Guide to Optimizing the Customer Experience Ben Reason, vlie, Lavrans LĂ, Melvin Brand Flu
The Ten Principles Behind Great Customer Experiences Matt Watkinson

Four star rating with growing community support.

Design Thinking: Integrating Innovation, Customer Experience, and Brand Value