The Bathroom Guest Book by Knock Knock is a hilarious restroom humor gift that is sure to entertain guests in any bathroom. This hardcover book features 112 pages of comedic content related to the bathroom, making it a fun and unique addition to any space. With a compact size of 8.8 inches in length and 6 inches in width, this book is a convenient and humorous way to add some personality to a bathroom setting. Perfect for adding a touch of humor to a guest bathroom or for personal enjoyment, this book is a great choice for anyone looking for a lighthearted read.