Value Proposition Design: How to Create Products and Services Customers Want
This hands-on book teaches you the processes and give you all the tools you need to create great products that sell.
100 Things Every Designer Needs to Know About People
Susan Weinschenk explains what makes people act the way they do and combines real science and research with practical examples to deliver a guide every product designer needs.
The Design of Everyday Things
The problem sits not always in front of the product. Usually we as product designers are responsible for bad UX Don Norman points out and shows how to pay attention to the needs of users and the principles of cognitive psychology.