This little book contains fill-in-the-blank lines to describe some aspect of sisterly love about a female sib. Just complete each line and voilà: you have a uniquely personal gift sis will read again and again. Make it as sappy, sassy, or silly as you choose! Knock Knock is an independent maker of clever gifts, books, and whatever else we can think up. Our mission is to bring humor, creativity, and smarts to everyday life. Put the fun in functional with Knock Knock stuff.