Book 1

Lunch Walks Among Us

by Jim Benton

Published 1 September 2004
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?

Book 2

Attack of the 50-Ft. Cupid

by Jim Benton

Published 1 January 2005
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?

Book 3

The Invisible Fran

by Jim Benton

Published 7 February 2005
Franny believes that nothing in the world compares to being a mad scientist and she's absolutely convinced that, if given the opportunity, every kid in her class would feel the same way. So Franny makes it her mission to bring out her classmates inner mad scientist. All she needs is a few open-minded students, a half-completed two-headed robot, and an invisibility potion...She's soon convinced three classmates that they know everything about science - the only thing is, they know NOTHING about science - and there's a lunatic robot running around to prove it...

Book 3

When Franny Stein, self-styled mad scientist, creates a robot to show her school friends the joys of science, she ends up learning something from them instead.

Book 4

The Fran That Time Forgot

by Jim Benton

Published 1 August 2005
Goosebumps and Bill Nye the Science Guy fans, meet Franny!

Franny K. Stein didn't think the time would ever come when someone would realize what the K in her name stood for. And she REALLY didn't think that same someone would say her middle name in front of the whole school! But that's what happened at the Science Fair award ceremony, and all the kids and teachers burst out laughing. So Franny does what any respectable mad scientist would do-she goes back in time to change her name.

However, things don't turn out quite as she calculated, and Franny ends up having to face her teenage self in a warped, fourth-dimensional, kid-versus-teen, good-versus-evil, Franny-versus-Franny battle of the minds!

Book 5

Goosebumps and Bill Nye the Science Guy fans, meet Franny!

Franny's faithful Lab assistant, Igor, has swallowed a doomsday device that is ready to go off at any moment! For a regular scientist, it might seem like there's 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 seat belts, it's going to be a bumpy ride!

Book 6

The Fran with Four Brains

by Jim Benton

Published 1 August 2007

Book 6

Goosebumps and Bill Nye the Science Guy fans, meet Franny!

Being a mad scientist in the modern world is very hard work. With so much that needs to be done in such a short period of time, multitasking can become overwhelming. Franny needs some additional help.

But for Franny there is only one person in the world she trusts to help her with her experiments: herself. So she acquires assistance the mad-scientist way...by building a few real, live, steel-plated Franbots!

Book 7

The Frandidate

by Jim Benton

Published 8 September 2009
Goosebumps and Bill Nye the Science Guy fans, meet Franny!

Franny K. Stein, Mad Scientist, has always had her eye on world domination, and she has to start somewhere...like her class elections! If people vote for her, they’ll be giving her all the control she wants.

But Franny’s platform doesn’t have the same appeal as her competitors who are offering new playground equipment, so she creates The Frandidate. Made of DNA samples from a dog, a chameleon and a parrot, along with a scrap of carpet (so she’ll know where people stand), Franny’s special suit helps her say and do exactly what people want! But when The Frandidate starts making promises she knows she can’t keep, Franny realizes she might have gone too far…

Book 8

Bad Hair Day

by Jim Benton

Published 23 July 2019
Franny K. Stein is back with another laugh-out-loud experimental adventure in the eighth book in the Mad Scientist series from Jim Benton, the New York Times bestselling author-illustrator of the Dear Dumb Diary and It’s Happy Bunny series.

Franny K. Stein isn’t a fan of glamour. She doesn’t style her hair, the thought of wearing makeup makes her want to gag, and she couldn’t care less about wearing dressy dresses when she’d much prefer her lab coat.

But sometimes Franny wonders if her mom wishes she were different. Which gives Franny an idea…for an experiment! What if she can turn the beauty products her mom loves into something more exciting?

Every experiment has its experimental error, and when Franny’s hair takes on a life of its own, Franny must save the day (and her hair) to finally realize her mom loves her just the way she is.

Book 8

Bad Hair Day

by Jim Benton

Published 23 July 2019

Book 9

Recipe for Disaster

by Jim Benton

Published 21 July 2020
Franny K. Stein is back with another laugh-out-loud experimental adventure in the ninth book in the Mad Scientist series from Jim Benton, the New York Times bestselling author-illustrator of the Dear Dumb Diary and It’s Happy Bunny series.

Franny K. Stein isn’t a good baker. But when she sees that the fundraisers for the art and music departments at her school aren’t making enough money, she decides to take matters into her own hands.

Using her genius mind and kitchen, which is really just another type of laboratory, she sets out to create The Most Delicious Muffin On Earth!

Sales, of course, go through the roof. But bad things can happen when people become exposed to the best thing they’ve ever tasted. They can become...overenthusiastic.

Book 10

Mood Science

by Jim Benton

Published 31 August 2021
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.

The Three-Headed Book

by Jim Benton

Published 5 May 2009

Spooky Science

by Jim Benton

Published 7 August 2007


Monster Maker

by Jim Benton

Published 7 August 2007

Mood Science

by Jim Benton

Published 31 August 2021
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.

Fans of Goosebumps and Bill Nye the Science Guy will fall head over heels for Franny K. Stein in this collectible paperback boxed set with the first ten laugh-out-loud experimental adventures in the Mad Scientist series.

Franny K. Stein is not your average girl—she’s a mad scientist. Her science experiments cause many misadventures from turning herself invisible to causing the ultimate bad hair day and more! Through it all, Franny relies on her wits and stays true to herself to save the day.

This delightfully mad paperback collection includes:
Lunch Walks Among Us
Attack of the 50-Ft. Cupid
The Invisible Fran
The Fran That Time Forgot
Frantastic Voyage
The Fran with Four Brains
The Frandidate
Bad Hair Day
Recipe for Disaster
Mood Science