05/10/2017 7:49 PM AEDT | Updated 05/10/2017 8:40 PM AEDT

Nana Accidentally Buys Super Inappropriate Book For Grandchild

This is why you should NEVER judge a book by its cover.

A grandmother in the U.S. has learned the age-old lesson to never judge a book by its cover after accidentally giving her six-year-old granddaughter a book described as "definitely not for all ages"

Twitter user Tiffany (@Tiffany1985B) shared pictures of the 'If Animals Could Talk' book on Wednesday after tweeting that she had called her mother to "ask if she had actually opened the book".

Spoiler alert: she hadn't.

The book's origins trace back to a Tumblr account created by co-authors Josh Cassidy and Carla Butwin. 'If ______ CouldTalk' featured jokes penned by Cassidy accompanied by Butwin's drawings.

Think you know what your favourite animals might be thinking? Think again.

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