Building a trustworthy experience to exchange personal books with unknown peers


Book2book is the outcome of a side and personal project developed over 4 months. This case study is a solution that allows private libraries around us become visible, enabling people to exchange their own collection of books with unknown peers in a safe way.

Concept Design, Information architecture, Interaction design, Interface design, Personas, Prototyping, Quantitative research, Qualitative research, Usability testing, User scenarios, Wireframes and Branding.
I worked on the design of the product from concept to final prototype. A big shout-out to André Martins, who supported me during the whole process.

Researching the background

The initial part of the project was quite broad. Would users lend their own book collection? Why, when and for which types of books would they use this service? Do they know anything about the sharing economy already? What type of user would be more inclined to use it? To solve all the questions, I approached possible users, in both quantitative and qualitative ways, as soon as possible, in order to gather some real findings that would build the ground of the experience. Briefly, results showed that almost half in a total of 52 expats who took part in the research, 64 % would agree to lend their books to people they don’t know if they were verified users and under the following circumstances:

↳ A strong way to keep track of the loans.
↳ A guarantee the book wouldn’t get damaged.
↳ A guarantee they would get them back.

  Also 80% purchase books online and the vast majority make use of a monitor screen to do their purchase. Therefore, it was clear that the main focus of the product should be a desktop application.
Some interesting findings
84% are familiar with the  sharing economy system.

Users would share their  archive in return of…

14% – Money
50% – Another book
22% – Being a member of a community
39% – To help
58% – To share
16% – To keep it more sustainable
36% – For fun
16% – I wouldn't share
03% – Other reasson

But how to build for trust?

There was a clear need to create a certain type of logic that would rule the exchange system in order to make people return the books to their owners. For this, a couple of hypotheses were tested.  The first one was a coin based system, where the user would earn coins when creating an account, pay coins when borrowing the book and earn coin when lending the book. The second option was to leave a deposit once the book is loaned. After the book is returned, the user would receive part of the deposit and the other part would be to pay the owner and the service.
Choosing a system and testing it
A user flow was created separating the two main journeys, so wireframes were quickly prototyped to test the idea.

During the tests, some users had trouble understanding how the coin system would work.

However, in the flow for the deposit system, everything went smoothly, making it clear what the next steps should be.

Check it here
Branding and components
Knowing that the risks were eliminated, the experience was ready to have a logo and an initial style guide. This is a glimpse of the Sketch file developed for Book2book.

Thanks for
stopping by!

If you think would be fun to work together, send me an email or contact me below. Here is my cv.