"Cam told me," Penn said. "We had a whole conversation. It was weird. He wanted to know if you were all right."

"That is weird," Luce agreed.

"No," Penn said, "what was weird was that he approached me and we had a whole conversation. Mr. Popularity… and me. Need I spell out my surprise any further? Thing is, he was actually really nice."

"Well, he is nice." Luce pulled her goggles off her head.

"To you," Penn said. "He's so nice to you that he snuck out of school to buy you that necklace—which you never wear."

"I wore it once," Luce said. Which was true. Five nights before, after the second time Daniel left her stranded at the lake, alone with his path lit up in the forest. She hadn't been able to shake the image of it and hadn't been able to sleep. So she'd tried on the necklace. She'd fallen asleep clutching it near her collarbone, and woken up with it hot in her hand.

Penn was waving three fingers at Luce, as if to say, Hello? And your point is…?

"My point is," Luce said finally, "I'm not so superficial that all I'm looking for is a guy who buys me things."

"Not so superficial, eh?" Penn asked. "Then I dare you to make a non-superficial list of why you're so into Daniel. Which means no He's got the loveliest little gray eyes or Ooh, the way his muscles ripple in the sunlight."

Luce had to crack up at Penn's high falsetto and the way she held her hands clasped to her heart. "He just gets me," she said, avoiding Penn's eyes. "I can't explain it."

"He gets that you deserve to be ignored?" Penn shook her head.

Luce had never told Penn about the times she'd spent alone with Daniel, the times when she'd seen a flash that he cared about her, too. So Penn couldn't really understand her feelings. And they were far too private and too complicated to explain.

Penn crouched down in front of Luce. "Look, the reason I came to find you in the first place was to drag you to the library for a Daniel-related mission."

"You found the book?"

"Not exactly," Penn said, extending a hand to help Luce out of the pool. "Mr. Grigori's masterpiece is still mysteriously missing, but I kind of sort of maybe hacked Miss Sophia's subscribers-only literary search engine, and a couple of things turned up. I thought you might find them interesting."

"Thanks," Luce said, hoisting herself out with Penn's help. "I'll try not to be too annoyingly gushy over Daniel."

"Whatever," Penn said. "Just hurry up and dry off. We're in a brief no-rain window outside and I don't have an umbrella."

* * *

Mostly dry and back in her school uniform, Luce followed Penn to the library. Part of the front portion had been blocked off by yellow police tape, so the girls had to slip through the narrow space between the card catalog and the reference section. It still smelled like a bonfire, and now, thanks to the sprinklers and the rain, possessed an added mildewy quality.

Luce took her first look at where Miss Sophia's desk had sat, now a charred, nearly perfect circle on the old tile floor in the library's center. Everything in a fifteen-foot radius had been removed. Everything beyond that was strangely undamaged.

The librarian wasn't at her station, but a folding card table had been set up for her next to the burned spot. The table was depressingly bare, save for a new lamp, a pencil jar, and a gray pad of sticky notes.

Luce and Penn gave each other a that-sucks grimace before they continued to the computer stations at the back. When they passed the study section where they'd last seen Todd, Luce glanced over at her friend. Penn kept her face forward, but when Luce reached over and squeezed her hand, Penn squeezed back pretty hard.

They pulled two chairs up to one computer terminal, and Penn typed in her user name. Luce glanced around just to make sure no one else was nearby.

A red error box popped up on the screen.

Penn groaned.

"What?" Luce asked.

"After four, you need special permission to access the Web."

"That's why this place is always so empty at night."

Penn was rooting through her backpack. "Where did I put that encrypted password?" she mumbled.

"There's Miss Sophia," Luce said, flagging down the librarian, who was crossing the aisle in a black fitted blouse and bright green cropped pants. Her shimmery earrings dusted her shoulders, and she had a pencil poked into the side of her hair. "Over here," Luce whispered loudly.

Miss Sophia squinted at them. Her bifocals had slipped down her nose, and with a stack of books under each arm, she didn't have a free hand to push them up. "Who's that?" she called, walking over.

"Oh, Lucinda. Pennyweather," she said, sounding tired. "Hello."

"We were wondering if you could give us the password to use the computer," Luce asked, pointing at the error message on the screen.

"You're not doing social networking, are you? Those sites are the devil's work."

"No, no, this is serious research," Penn said. "You'd approve."

Miss Sophia leaned over the girls to unlock the computer. Fingers flying, she typed in the longest password Luce had ever seen. "You have twenty minutes," she said flatly, walking away.

"That should be enough," Penn whispered. "I found a critical essay on the Watchers, so until we track down the book, we can at least read up on what it's about."

Luce sensed someone standing behind her and turned around to see that Miss Sophia had returned. Luce jumped. "I'm sorry," she said. "I don't know why you scared me."

"No, I'm the one who's sorry," Miss Sophia said. Her smile practically made her eyes disappear. "It's just been so hard recently, since the fire. But there's no reason for me to take my sorrow out on two of my most promising students."

Neither Luce nor Penn really knew what to say. It was one thing to comfort each other after the fire. Reassuring the school librarian seemed a little bit out of their league.

"I've been trying to keep busy, but…" Miss Sophia trailed off.

Penn glanced nervously at Luce. "Well, we might be able to use some help with our research, if, that is, you—"

"I can help!" Miss Sophia tugged over a third chair. "I see you're looking into the Watchers," she said, reading over their shoulders. "The Grigoris were a very influential clan. And I just happen to know of a papal database. Let me see what I can pull up."

Luce nearly choked on the pencil she'd been chewing. "I'm sorry, did you say Grigoris?"

"Oh yes, historians have traced them back to the Middle Ages. They were…" She paused, searching for the words. "A sort of research cluster, to put it in modern layperson's terms. They specialized in a certain type of fallen-angel folklore."

She reached between the girls again and Luce marveled as her fingers raced across the keyboard. The search engine struggled to keep up, pulling up article after article, primary source after primary source, all on the Grigoris. Daniel's family name was everywhere, filling up the screen. Luce felt a bit light-headed.

The image from her dream came back to her: unfurling wings, her body heating up until she smoldered into ash.

"There are different kinds of angels to specialize in?" Penn asked.

"Oh, sure—it's a wide body of literature," Miss Sophia said while she typed. "There are those who became demons. And those who threw in with God. And there are even ones who consorted with mortal women." At last her fingers were still. "Very dangerous habit."

Penn said, "Are these Watcher dudes any relation to the Daniel Grigori here?"

Miss Sophia tapped her mauve lips. "Quite possible. I wondered that myself, but it is hardly our place to be digging into another student's business, wouldn't you agree?" Her pale face pinched into a frown as she looked down at her watch. "Well, I hope I've given you enough to get started on your project. I won't hog any more of your time." She pointed at a clock on the computer screen. "You've only got nine minutes left."