It’s a double mystery when a robot and a hamster go missing before the science fair in the third book of this full-color early chapter book series about the best detectives in the Midwest!

"Imagines an alternate 1826 London, where Ada Lovelace (the world's first computer programmer) and Mary Shelley (author of Frankenstein) meet as girls and form a secret detective agency. Their first case involves a stolen heirloom, a false confession, and an array of fishy suspects"-- Provided by...

There's been a break in at the British Museum and someone's after the priceless Rosetta Stone. When Lottie spots a hidden message, she and her friends might be on the verge of a great discovery. Can they follow the clues and what will they find it they do ?

Lunch Lady and Betty have been fired but the Breakfast Bunch convinces them to return and stop the school's new superindendent and her minions from carrying out an evil plan for revenge.

The Thea Sisters are visiting friends in Spain when a mysterious theft turns their trip into an investigation! They end up hot on the trail of a secret treasure. The mouselets are in for an incredible adventure full of flamenco dance!.

For having skipped the school field trip, Dee, Hector, and Terrence must join the mathletes team, but as they are poised to beat the undefeated champions, secret crime fighter Lunch Lady discovers something strange about the opposing team.

When eccentric photographer Stefani DePino comes to Thompson Brook to take school pictures in the midst of an acne epidemic, Lunch Lady, Betty, and the Breakfast Bunch learn that Stefani is using them to break into the world of high fashion.

Eleven-year-old Clara Frankofile sits in her parents' elegant New York City restaurant, Pish Posh, and passes judgement on each customer as a Somebody or a Nobody, but her all-seeing eyes fail to observe the mysterious events occurring right under her nose.

Young Detective Jeffrey Bones begins gathering clues when Mr. Green asks for his help finding the school bus he lost while shopping at the mall.

Detective Jeffrey Bones finds he does not need fancy equipment to solve the school-lunch mystery of Not Me Amy's missing cupcake.