We have a feature that lets you "hide" a book, so it does not appear on your profile page on Leanpub.
To "hide" a book, find it in your author dashboard:
Next, hover your mouse over the little "eye" icon you'll see under the book's cover image:
Next, click the "Hide" button:
The book will no longer be displayed on your profile page, and you will see this icon in your dashboard:
To undo this, just hover your mouse over the icon again, and click the "Show" button: