Pentide

He uncapped the pen. As usual, it sprang into a full-sized sword. Annabeth had watched him do this hundreds of times. Normally when he fought, Percy simply discarded the cap. It always appeared in his pocket later, as needed. When he touched the cap to the point of the sword, it would turn back into a ballpoint pen.
“What if you touch the cap to the other end of the sword?” Annabeth said. “Like where you’d put the cap if you were actually going to write with the pen.”

Uh...” Percy looked doubtful, but he touched the cap to the hilt of the sword. Riptide shrank back into a ballpoint pen, but now the writing point was exposed.
“May I?” Annabeth plucked it from his hand. She flattened the napkin against the altar and began to write. Riptide’s ink glowed Celestial bronze.
“What are you doing?” Percy asked.
“Sending a message,” Annabeth said. “I just hope Rachel gets it.” “Rachel?” Percy asked. “You mean our Rachel? Oracle of Delphi Rachel?” “That’s the one.” Annabeth suppressed a smile.
Whenever she brought up Rachel’s name, Percy got nervous. At one point, Rachel had been interested in dating Percy. That was ancient history. Rachel and Annabeth were good friends now. But Annabeth didn’t mind making Percy a little uneasy. You had to keep your boyfriend on his toes.
Annabeth finished her note and folded the napkin. On the outside, she wrote: Connor,
Give this to Rachel. Not a prank. Don’t be a moron. Love, Annabeth

HoH ch.23