“Got it!” Drusilla announced suddenly. She stood up from rummaging around in the map chest with a long piece of parchment in her hands. Livvy, abandoning the parabatai discussion, hurried over to help her carry it to the table.

In a clear bowl on the table’s center was a heap of sea glass the Blackthorns had collected over the years—lumps of milky blue, green, copper, and red. Emma and Ty used the blue glass to weigh down the edges of the ley line map.

Tavvy, now sitting on the edge of the table, had begun sorting the rest of the sea glass into piles by color. Emma let him; she didn’t know how else to keep him distracted just now.

“Ley lines,” Emma said, running her index finger over the long black lines on the map. It was a map of Los Angeles that probably dated back to the forties. Landmarks were visible under the ley lines: the Crossroads of the World in Hollywood, the Bullocks building on Wilshire, the Angels Flight railroad in Bunker Hill, the Santa Monica Pier, the never-changing curve of the coast and the ocean. “All the bodies were left under the span of a ley line. But what Magnus said is that there are places where all the ley lines converge.”

“What does that have to do with anything?” Livvy asked, practical as always.

“I don’t know, but I don’t think he would have said it if it didn’t matter. I imagine the place of convergence has some pretty powerful magic.”

As Ty applied himself to the map with renewed vigor, Cristina came into the library and gestured for Emma to come talk to her. Emma slid off the table and followed Cristina to the coffeemaker by the window. It was witchlight powered, which meant there was always coffee, although the coffee wasn’t always very good.

“Is Julian all right?” Emma asked. “And Mark?”

“They were talking when I left.” Cristina filled two cups with black coffee and dumped in sugar from a small enamel pot on the windowsill. “Julian calmed him down.”

“Julian could calm anyone down.” Emma picked up the second cup of coffee, enjoying the warmth against her skin, though she didn’t really like coffee and didn’t tend to drink it. Besides, her stomach was tied in so many knots she didn’t think she could force anything down.

She walked back toward the table where the Blackthorns were arguing about the ley line map. “Well, I can’t help it if it doesn’t make sense,” Ty was saying peevishly. “That’s where it says the convergence is.”

“Where?” Emma asked, coming up behind him.

“Here.” Dru pointed at a circle Ty had sketched on the map in pencil. It was over the ocean, farther out from Los Angeles than Catalina Island. “So much for anyone doing magic there.”

“Guess Magnus was just making conversation,” said Livvy.

“He probably didn’t know—” Emma began, and broke off as the library door opened.

It was Julian. He stepped into the room and then moved to the side, diffidently, like a conjuror presenting the result of a trick.

Mark moved into the doorway after him. Julian must have gotten Mark’s old things out of the storeroom. He was wearing jeans that were slightly short on him—probably a pair of his old ones—and one of Julian’s T-shirts, heather gray and washed to a soft fadedness. In contrast, his hair looked very blond, almost silvery. It hit his shoulders, looking slightly less tangled, as if he’d brushed the twigs out of it at least.

“Hello,” he said.

His siblings looked at him in silent, wide-eyed astonishment.

“Mark wanted to see you,” Julian said. He reached around to ruffle the hair on the back of his neck, looking bemused, as if he had no idea what to do next.

“Thank you,” Mark said. “For the gifts of welcome you gave me.”

The Blackthorns continued to stare. Nobody moved except Tavvy, who slowly laid his sea glass down on the table.

“The box,” Mark clarified. “In my room.”

Emma felt the coffee cup she was holding plucked out of her hand. She made an indignant noise, but Cristina was already holding it, crossing the room, past the table, and walking up to Mark, her back straight. She held out the mug.

“Do you want some?” she said.

Looking relieved, he took it. He lifted it to his mouth and swallowed, his whole family watching him in amazed fascination as if he were doing something no one had ever done before.

He grimaced. Moving away from Cristina, he coughed and spit. “What is that?”

“Coffee.” Cristina looked startled.

“It tastes of the most bitter poison,” Mark said indignantly.

Livvy suddenly giggled. The sound cut through the stillness of the rest of the room, the frozen tableau of the others.

“You used to love coffee,” she said. “I remember that about you!”

“I can’t imagine why I would have. I’ve never tasted something so disgusting.” Mark made a face.

Ty’s eyes flicked between Julian and Livvy; he looked eager and excited, his long fingers tapping at the table in front of him. “He isn’t used to coffee anymore,” he said to Cristina. “They don’t have it in Faerie.”

“Here.” Livvy stood up, scooping an apple from the table. “Have this instead.” She went forward and held out the apple to her brother. Emma thought she looked like a latter-day Snow White, with her long dark hair and the apple in her pale hand. “You don’t mind apples, do you?”

“My thanks, gracious sister.” Mark bowed and took the apple, while Livvy looked at him with her mouth partly open.

“You never call me ‘gracious sister,’” she said, turning to Julian with an accusing look.

He grinned. “I know you too well, runt.”

Mark reached up and drew the chain from around his throat. Dangling from the end of it was what looked like the head of an arrow. It was clear, as if made of glass, and Emma recalled having seen something like it in pictures Diana had showed them.

Mark began to use the edge of it to peel his apple, matter-of-factly. Tavvy, who had crawled under the table again and was looking out, made an interested noise. Mark glanced at him and winked. Tavvy ducked back under the table, but Emma could see that he was smiling.

She couldn’t stop looking at Jules. She thought of the way he’d cleaned out Mark’s room, hurling his brother’s things savagely into a pile as if he could shatter the memories of him. It had lasted only a day, but there had been shadows in his eyes since. She wondered, if Mark stayed, would the shadows disappear?

“Did you like the presents?” Dru demanded, swiveling around on the table, her round face anxious. “I put bread and butter in for you in case you were hungry.”

“I did not know what all of them were,” Mark said candidly. “The clothes were very useful. The black metal object—”

“That was my microscope,” Ty said, looking at Julian for approval. “I thought you might like it.”

Julian leaned against the table. He didn’t ask Ty why Mark would want a microscope, just smiled his sideways, gentle smile. “That was nice of you, Ty.”

“Tiberius wants to be a detective,” Livvy explained to Mark. “Like Sherlock Holmes.”

Mark looked puzzled. “Is that someone we know? Like a warlock?”