Goodreads

I like using Goodreads https://www.goodreads.com/ because it helps me to keep track of what books I have read.  I like mysteries, and I like to read mysteries that are series, and I like to read mysteries series in order.  I use Fantastic Fiction http://www.fantasticfiction.co.uk/ to help me to keep track of books in series in order of what they are written so I can read them in order.  I also use Fantastic Fiction to help me to keep track of which of my favorite authors have new books in their series

But, Goodreads helps me to remember what I have read.  I am not interested in writing reviews.  I do rate books. But, sometimes, when I am reading a lot of books in a row from a series, I lose track. So Goodreads helps.