About The Book

Phineas L. MacGuire (a.k.a. Mac) has three goals for fourth grade:

1. To be the best fourth-grade scientist ever.

2. To be the best fourth-grade scientist ever.

3. To be the best fourth-grade scientist ever.


It's a tall order, but he's confident that he can achieve it, especially since his friend and rival scientist, Aretha, has asked him to help her earn a scout badge by creating the mold that produces penicillin. After all, who knows more about mold than Mac? And how many fourth graders can say that they've reproduced penicillin? None, as far as Mac knows. But then he has to manage Ben's campaign for class president and deal with his new babysitter, Sarah Fortemeyer, the Teenage Girl Space Alien from the Planet Pink who accidentally got rid of his dried worm collection and now he has to find it. How is he supposed to find time to focus on mold?

The second book about Phineas L. MacGuire and his scientific experiments, Phineas L. MacGuire...Gets Slimed!, is as much fun as the first, and includes slimy new experiments that you can do at home!

About The Author

Photograph (c) Clifton Dowell

Frances O’Roark Dowell is the bestselling and critically acclaimed author of Dovey Coe, which won the Edgar Award and the William Allen White Award; Where I’d Like to BeThe Secret Language of Girls and its sequels The Kind of Friends We Used to Be and The Sound of Your Voice, Only Really Far AwayChicken BoyShooting the Moon, which was awarded the Christopher Award; the Phineas L. MacGuire series; Falling In; The Second Life of Abigail Walker, which received three starred reviews; Anybody Shining; Ten Miles Past NormalTrouble the Water; the Sam the Man series; and The Class. She lives with her family in Durham, North Carolina. Connect with Frances online at FrancesDowell.com.

About The Illustrator

Preston McDaniels is the illustrator of the Phineas L. MacGuire series and Cynthia Rylant’s Lighthouse Family series. He lives in Aurora, Nebraska, with his wife and two daughters.

Product Details

  • Publisher: Atheneum Books for Young Readers (September 1, 2007)
  • Length: 208 pages
  • ISBN13: 9781416901969
  • Grades: 3 - 7
  • Ages: 8 - 12
  • Lexile ® 870

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Awards and Honors

  • Bank Street Best Books of the Year
  • Eleanor Cameron Golden Duck Award

Resources and Downloads

High Resolution Images

More books from this author: Frances O'Roark Dowell

More books from this illustrator: Preston McDaniels

More books in this series: From the Highly Scientific Notebooks of Phineas L. MacGuire