If you especially enjoy the books of an author and would like to stay up-to-date with whatever they might publish in the future, you might consider subscribing to them.
After you subscribed to somebody, their new publications will automatically be shown in your dashboard. Also, if you have email notifications turned on (in your Account settings), you will receive an email.
You can check and cancel your subscriptions at any time in your under "Subscriptions" in your account's settings.
Subscriptions are completely anonymous. Nobody sees who you're subscribed to, and not even author know who is subscribed to them, although the number of subscribers is visible in every author's profile.
When you subscribe to someone, they also receive a small amount of Fairy Dust.