The Third-Grade Detectives: Mind-Boggling Collection Set of 6

The Clue of the Left Handed Envelope

Everyone loves the new teacher, Mr. Merlin. Mr. Merlin used to be a spy, and he knows all about secret codes and the strange and gross ways the police solve mysteries.

Now there's a mystery in their very own class -- someone sent Amber Lee Johnson an anonymous letter. Noelle and Todd want to solve the mystery before anyone else. But first they have to figure out Mr. Merlin's clues. How can a bunch of envelopes tell them who sent the letter?

The Cobweb Confession

Poor Todd. First he has to give up his room for an old friend of his father's who's visiting. Then his valuable baseball card collection is stolen. Now Mr. Merlin says the class is going to be studying spiders. Todd hates spiders.

But then Mr. Merlin tells the Third-Grade Detectives that a spider's web may help catch the thief. Maybe spiders aren't so bad after all.

The Mystery of the Hairy Tomatoes

Someone's been digging up Mrs. Ruston's tomatoes. She thinks it's Noelle's dog, Rover, and unless Noelle can find the real thief, Rover's in big trouble.

It's the hairiest case yet for Mr. Merlin's Third-Grade Detectives. Hair in Mrs. Ruston's tomato patch, hair in Amber Lee's hamburger -- can Noelle and Todd comb through the evidence and solve the mystery?

The Puzzle of the Pretty Pink Handkerchief

Todd's ears are so clogged up he can't hear, but he doesn't want to miss school. His teacher, the ex-spy Mr. Merlin, is sure to have secret codes for the class to figure out and a new mystery for them to solve.

But the mystery turns out to be in Todd's own backyard. Someone's been in his tree house and left a pretty yucky clue. It's another case for Mr. Merlin's police scientist friend, Dr. Smiley!

The Riddle of the Stolen Sand

A Case That's Tougher To Crack Than An Oyster Shell. Everybody loves Mr. Roper. He gives kids free candy or ice cream when their parents shop at his grocery store. So when he's accused of selling stolen oysters, Mr. Merlin's Third-Grade Detectives don't believe it. But can they prove it? Mr. Merlin's secret codes have the Detectives looking for clues at the beach, at rival oyster farms, and even in a garbage truck -- yuck! It turns out pearls aren't the only valuable thing you can get from oysters -- you can also get evidence to help solve a baffling mystery!

The Secret of the Green Skin

The new restaurant in town is a hit, but when several diners get sick, the Health Department threatens to shut the place down. And if the restaurant closes, Todd and Noelle's new friend, JoAnn, may have to move.

Mr. Merlin's Third-Grade Detectives want to prove that the problem wasn't the restaurant's fault. But Mr. Merlin's clue doesn't make any sense -- how can green be dangerous?