Master product designer, Donald Norman, who wrote The Design of Everyday Things in his younger days, has turned away from the idea of utilitarian design and has written this inspired book on the importance of beauty in new product design. 

Effective Prototyping

As product manager, you have specific use-case that you want to make available to your users.  To bring your vision to life, you will need to develop UX that visually communicates exactly the experience that you want your users to have. 

Effective Prototyping is one of the best books around on how to test and retest your UX before investing in comps, and code. 

Written by the famous Dr. Bill Buxton, Sketching User Experience is one of the great books on UX design.  Buxton, has a lifetime of experience in UX research and he brings his best ideas to life in this text. 

Featured Prototyping 

Tool: Balsamiq