Can you detect a hoax from the real deal? See right through photo trickery? Spot the phony logic in a story in seconds? Put your sleuthing skills to work in this fun book! See if you can find the truth behind bizarre stories, faulty facts, iffy lists, news headlines, and more.

Does the world's largest mushroom (a humongous fungus!) really cover a space the size of 1,665 football fields? Did people really once pay a "knocker-up" to bang on their window each morning as an early version of the alarm clock? Check the Fib-o-Meter to find out! Complete with incredible photos and quirky collage art, this is another Nat Geo Kids book you have to read to believe...or disbelieve!