Author Mary Pope Osborne, who recently donated 28-book sets of the series to every third-grade student and teacher in Newark, N.J., discussed how she settled on a treehouse as a mode of transport, how she hopes to inspire kids about history, and which of the books young readers love the most. Here are excerpts of the interview.
Q: How did the idea of a magical treehouse come to you?
A: I'd tried many things to get kids back in time: a magic cellar, magic whistles, magic artist's studio, magic museum. Nothing was working and I was really about to give up after a year. I was walking through some woods in Pennsylvania near a cabin that Will [Osborne] and I used to have, and we saw an old treehouse that was all rickety and pretty well run-down. We started talking about, "What if I put the characters in a treehouse?" Because then it would always be hidden up in the trees and they could travel anywhere with stuff in it. Finally, that night, we thought it'd be cool to have the treehouse filled with books, because books are magic. The moral of the story is the simplest ideas are the hardest to find.
Q: After graduating college, you traveled with a group of other young people to various locations like Iraq and Pakistan and India – how did doing that traveling affect your writing of the series?