I totally agree with that one review, it doesn't matter how old you are if you love guinea pigs, or just pets in general you must read this book! I wanted the book for Christmas, I love guinea pigs and I'm 26 years old. The cover is too precious! I just had to have it! This story introduces to people to what wonderful pets guinea pigs really are. This is a wonderful story about friends who have a passion for guinea pigs. I highly reccomend this story for any age. Kristy-guinea pig owner for almost 20 years!