2 will hit shelves Sept. 13.

2 and EW has the exclusive first details, starting with the cover reveal above.

What is the first thing ever that you remember writing?

What If? 2

‘What If? 2,’ by Randall Munroe.Credit: Riverhead Books

A champion thoroughbred can run a mile a minute."

Which book is at the top of your current to-read list?

Where do you write?

whats-in-a-page

Which book made you a forever reader?

I’ll always have a soft spot forA Wrinkle in Time, by Madeleine L’Engle.

If you could change one thing about any of your books, what would it be?

InThing Explainer, I explained how things worked using only the thousand most common English words.

Try describing how a sailing ship works without any of those words!

What is your favorite part ofWhat If?

I’ve gotten a few questions from little kids.

One of the most catastrophic scenarios in the book is a question from a kid about soup.

Write a movie poster tag line for the book:

I’m torn between “What If?

2: What if” and “What If?

2: What else.”

I think I’d just go with “What If?