[sahinyanlik]

I am using goodreads.com to create my shelves.

* You can find your book easily and add to your shelf and also you can track if you read or not. * Most of the book have its photos. I have both Turkish and English books and for both it is very effective. I didn't try Calibre for Turkish books btw. Also you can check your books anywhere you like.

[Fnoord]

Calibre can integrate with Goodreads if you use the plugin in Calibre for Goodreads. This way you can synchronize your shelves and progress. There's an obvious downside to Goodreads: your privacy. Having all my privacy settings as high as possible, I do like it, but a data leak would expose my personal data.

[zorbash]

Unfortunately goodreads looks like its on maintenance mode in the last few years. The ability to post updates on books / publications which don't have ISBN is the feature I miss the most :-(

[legooolas]

Goodreads requires all books/shelves are publically-visible, which you may not want.