Looks like you wanted to make sure your friend Sarah saw this. Depending on how she does her feed settings, she may never see this message since you've posted it in a public forum.
If you'd like to be certain she gets this, I would recommend using Goodreads Message function. At the top right of your screen, you will see a little envelope icon. If you click on that, it will take you to your inbox, where you will find a compose option on the left side of the screen.
Looks like you wanted to make sure your friend Sarah saw this. Depending on how she does her feed settings, she may never see this message since you've posted it in a public forum.
If you'd like to be certain she gets this, I would recommend using Goodreads Message function. At the top right of your screen, you will see a little envelope icon. If you click on that, it will take you to your inbox, where you will find a compose option on the left side of the screen.