Revealed by Margaret Peterson Haddix

“I don’t know if he survived, or . . .”
    â€œLet’s look!” Angela said, pointing to the wall full of monitors.
    Jonah realized that the screen that had contained the view of the Spirit of St. Louis now held nothing but random dark-and-light pixels, even as the rest of the monitors kept showing endless loops of his friends and his sister vanishing.
    â€œAngela, we can’t,” kid JB said, his face twisted with worry again. “I don’t trust these monitors. No matter how carefully I set the coding, we could end up dangling from that little plane again.”
    â€œSo? I’ll just scream for help and the Elucidator will rescue us again,” kid Angela said.
    â€œAnd then, even if Charles Lindbergh survived his last encounter with us, this time we really could end up killing him?” kid JB asked.
    Jonah could see why this might not be a good idea.
    â€œThen let’s go to some other time in Lindbergh’s life after that, to see if he’s there or not,” kid Angela argued. “We have to find out! What about—what about when helands in Paris? It was kind of like a stampede; everyone was so eager to get close to Lindbergh. So that would be life-threatening too. People were in danger of dying. So that way I’d scream and we’d get back here right away.”
    Angela’s using “It’s life-threatening!” as an argument for doing this? Jonah marveled.
    She would never have done that as an adult.
    JB wasn’t disagreeing. He had his head tilted sideways, considering.
    â€œIn the early days of time travel, Lindbergh landing in Paris was one of the moments in history that a lot of people wanted to go visit,” kid JB said. “They loved the excitement, the sense of triumph—it was one of those moments of pure joy. . . .”
    â€œOkay, that’s even better,” Jonah said. “So why don’t we just go meet up with one of those time travelers? We could hitchhike back home with them. Or ask to borrow their Elucidator.”
    â€œExactly what I was thinking,” kid JB said. He started punching codes into the keyboard on the wall. “Except I wasn’t going to ask. Anybody ready to play Grand Theft Elucidator?”

SIXTEEN
    Jonah stood with the other two in front of the wall full of monitors. They’d taken a short break because JB had suddenly realized that they couldn’t appear in 1920s Paris in twenty-first-century blue jeans and T-shirts. Until they got a working Elucidator, they wouldn’t have the protection of invisibility.
    Fortunately, it turned out that there was a small stash of what JB called “emergency costumes” at the back of the cave. Now Jonah and kid JB were both wearing light pullover sweaters; a weird kind of pants that ended at their knees; and stiff, uncomfortable brown shoes. Angela had on what she called a “flapper” dress. It just looked baggy and shapeless to Jonah.
    â€œReady?” JB said, stepping toward the keyboard in the wall. “I can’t do projections ahead of time, and I can’ttarget our landing position very precisely, so we may have to react quickly when we arrive.”
    â€œWe know,” Jonah said impatiently. “You’ve already said that ten times.”
    Had becoming thirteen again turned JB into an even bigger worrywart than he had been as an adult?
    Or was he repeating himself because he couldn’t remember what he’d said before?
    â€œOh, right,” JB said sheepishly, in a way that made it seem like he knew what he was saying.
    He started typing in the code. Jonah felt his muscles tighten up. This was like standing on the sidelines of a soccer game, on the verge of being sent in to play. Except in a soccer game Jonah only worried about messing up and letting the other team get the ball. This time he was worried about ruining all of history and making time collapse and not being able