Franny K. Stein is not your average girl—she’s a mad scientist. She prefers poison ivy to daisies, and when Franny jumps rope, she uses her pet snake. The kids in Franny’s class think she’s weird, wacky, and just plain creepy. Tired of being stared at, Franny decides to attempt her most dangerous experiment yet—she’s going to fit in. But when a giant Monstrous Fiend attacks the class, everyone knows only a true mad scientist can save the day. But has Franny lost her creepy, crawly ways?

SUGAR AND SPICE? NO WAY!

Franny's faithful lab assistant, Igor, has swallowed a doomsday device that is ready to go off at any moment! For any regular scientist, there is only one way to get the device out -- um...make that two ways. But Franny K. Stein is no ordinary scientist, so she concocts her own way to get the device back and save her friend. With her miniaturization machine, Franny shrinks herself to the size of a pin and goes on a field trip like no other...through the body of a ticking time-dog! Fasten your seatbelts, it's going to be a bumpy ride!

Two heads...Are dumber than one.

It's time...for a change!

Fans of Goosebumps and Bill Nye the Science Guy will fall head over heels for Franny K. Stein, who is back with another laugh-out-loud experimental adventure in the tenth book in the Mad Scientist series. Franny K. Stein has had quite enough of her feelings getting in the way. So she physically removes them with the help of one of her machines. But it turns out that not having feelings can make things even worse, especially when you’ve accidentally released a virus that’s turning everybody into toads. Good thing she has the help of her grandma, Granny Fran, and her Sense of Duty to help her shake the apathy.

Franny’s mom says every mad scientist needs a lab assistant. So for Valentine’s Day Franny gets just that—a Lab assistant. Except Igor isn’t a pure Lab. He’s also part poodle, part Chihuahua, part beagle, part spaniel, part shepherd—and all thumbs. Franny is fuming. She doesn’t even need an assistant. What’s she supposed to do with a good-for-nothing one like Igor? And things get even worse when a giant, fifty-foot, arrow-shooting cupid starts causing trouble all over town. Franny knows it’s up to her—and only her— to save the day. Or could she use a little help?