At the same time, I doubt myself when buying another paper book, primarily because of the cost, partly because of the delivery time. This sparked the question - how can people easily share their books?

First, we need to understand - "How is this problem being solved today?" To answer this complex question, I conducted extend UX research, including:

Market research:

2. Competitor analysis

Direct competitors. After analyzing users feedback from 20+ mobile apps of, I find out that main issues are:

Indirect Competitors. From various mobile apps that are related to sharing books or reading experiences, I discovered that:

3. Defining use cases and user pains:

So after going over 500+ reviews, I defined 2 use cases (which can be shared by 1 person) and main stoppers for those who wants to share and/or to find the book, such as:

4. Creating Informational Architecture (IA)

I builded an app informational architecture where I listed all screens and features in a way where both use cases (“to share” and “to borrow”) will be easy to access.

choose and apply UX patterns to make the interface look intuitive and meet user expectations

not try to cover everything, but focus on a small piece (like a single flow or use case) and finalize it

communicate ideas and build a teamwork with other designers from my group, learn from their approaches.