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Special Events

In collaboration with Bedtime Math

Visit beautiful Digitopolis, the mathematical kingdom from The Phantom Tollbooth!

Meet the good citizens of Digitopolis, including Laura Overdeck of Bedtime Math! Tap into the work of Professor Dan Rubenstein of Princeton University, visit the Fibonacci Forest, listen to sound fractions, immerse yourself in the Infinity Boxes of artist Matt Elson, and chat with our esteemed Mathamagician (otherwise known as Brent Ferguson, faculty of math at the Lawrenceville School).

Full of hands-on exploration, demonstrations, games, challenges, and unexpected connections, Digitopolis is for both the mathphilic AND the mathphobic. It's going to be amazing fun!

Saturday, April 9
1:00pm - 4:00pm
Frick Chemistry Building, Princeton University campus (map and parking info)
Free of charge
Recommended for children ages 4-10



It’s our first BiblioFiles in front of a live audience! This April, our guest will be Norton Juster, author of the legendary book The Phantom Tollbooth.

Milo is a boy who doesn’t know what to do with himself, isn’t interested in much, and doesn’t see the point in anything. But when a mysterious package containing a toy tollbooth arrives in his room, everything changes.

Past the tollbooth are the Lands Beyond, which house Dictionopolis, the Valley of Sound, the Doldrums, Digitopolis, and the Mountains of Ignorance. Milo is soon joined by a pair of unusual travel companions, Tock and Humbug, as he attempt to bring Princesses Rhyme and Reason back to settle the warring kingdoms of Words and Numbers.

In over 50 years of publication, The Phantom Tollbooth, with its iconic illustrations by Jules Feiffer, has been analyzed in scholarly papers, quoted in dissertations, included in graduate classes, read aloud in elementary school classrooms, passed along through generations of families, and newly discovered by young readers. It is, and will always be, a seminal book in the history of children’s literature. 

In addition to The Phantom Tollbooth, Norton Juster has written The Dot and the Line: A Romance in Lower Mathematics, The Hello, Goodbye Window, Sourpuss and Sweetie Pie, The Odious Ogre, and Neville.

The interview will be followed by a book signing from 3:00pm-5:00pm.

Saturday, April 30
Friend Center, Room 101 (map and parking info)
Registration REQUIRED
Free of charge
Ages 9 - 99

Registration begins April 18. Please contact Dana Sheridan (; 609-258-2697) and provide the name of each attendee. No groups tickets please.

This is a live recording in front of an audience, which relies on optimal sound quality and lack of interruption. The interview will begin promptly at 2:00pm, and there will be no admittance once it has begun. Due to the nature of the event, crying, talking, or restless children who cannot remain in their seats will be asked to exit the auditorium. Again, we’d like to emphasize that this event is for adults and children ages 9 & up. 

The interview will be available as a webcast on Saturday, May 14


350 for 50

It’s time for Cotsen’s annual writing competition! We challenge you to write a short, 350-word story that includes the sentence, "It unfurled slowly, then settled.” (just 345 words left to go!). Winning stories will be illustrated and published in the Summer 2016 issue of the Picture Book Press, and on our Pop Goes the Page creative blog. Additionally, the authors will enjoy a $50 shopping spree at Labyrinth Books!

Open to ages 9-14

Contest submissions are due by 3:00pm on Monday, May 9

350 for 50 Contest Submission Requirements

  • Stories must be no longer than 350 words and MUST include the sentence, "It unfurled slowly, then settled.”
  • Please submit entries as a Word file, PDF, or embedded in the text field of an e-mail message. Do not share through Google Docs.
  • One submission per author, please. E-mail to:
  • No poems, illustrations, or comics, please.
  • One winner will be selected from each of our three age categories (ages 9-10, 11-12, and 13-14).
  • The following MUST be included with your submission: Your name, age (as of May 9, 2016), and your mailing address. Please make sure this information is on the SAME PAGE as your story!
  • Your name, information, and title are not included in the 350 word count.
  • The three winners will be notified via e-mail on May 16.