If you'd prefer that your name doesn't appear on the supporters list on the website (or inside the book) you can pledge anonymously. Just log in and head over to your Account Settings.
Here you can click the 'pledge anonymously' button.
You can still get your name in the back of the book whilst being anonymous online, just add your name in the back by following these steps. Please note that if you press the 'pledge anonymously' check box after you have added the names in the back then the names won't be removed.
If you don't want your name in the back of the book, you can simply delete the name in the Your Account's section. Click here to learn more.