Possible additions to the overview

“Goodreads is the world’s largest site for readers and book recommendations. Their mission is to help people find and share books they love. Goodreads launched in January 2007.
Goodreads allows its users to: 
•	See what books their friends are reading.
•	Track the books they are reading, have read, and want to read.
•	Check out the users’ personalized book recommendations. Goodreads’ recommendation engine analyzes 20 billion data points to give suggestions tailored to users’ literary tastes.
•	Find out if a book is a good fit for the user from their community’s reviews. ” *

*https://www.goodreads.com/