Ask HN: What apps/sites you use to keep track of the books you read?

I built my own book "review" site (it's really just my thoughts on a book, not necessarily "reviews"). Every book I read gets a review on my site. It's pretty much just a basic CRUD app, nothing special. The upside of it is that it's a nice go-to source when people ask me for book recommendations.

I've been facing the same problem so I've decided to make it my next side-project and build the simplest way to keep track of books online. Here is the link: http://www.booknshelf.com/

I currently do not use any, I use to be a paper only person, but I use a kindle now.

I guess I just can scroll through what is on my kindle.

I kind of like how Derek Sivers does it with book notes on his site https://sivers.org/book

My book shelf for pastime books. Why would I need to track them?

For professional literature / academics: http://papersapp.com/

Google Spreadsheet. I have some cells that calculate the total amount of pages read and also the average time it takes me to finish a book.

> calculate... the average time it takes me to finish a book

Out of curiosity, why?

No reason really. It's just easy with a spreadsheet since I write the start and finish date anyway. It's not really useful as all books are different anyway.