If you ever run into a “UX agency” and they’re not familiar with Don Norman’s work, you might want to reconsider working with them.
He’s well known in the UX field for his research and publications about human—computer interaction, and is credited with coining the term “user experience”.
Intended to be “a starter kit for good design” this is a book written for an audience larger than just those in the design field. Learn about discoverability, understanding, and affordances in a discussion about everyday objects and how you can incorporate these concepts in your design process to create user friendly work.