Rick Riordan. The Heroes Of Olympus. The House Of Hades (№ 280169)

Each time, she had only to mention the name Rachel, Percy started to get nervous. There was a time when Rachel was hoping to start Dating Percy. But that was a long time ago. Right now she and Annabeth became good friends. But that didn't stop Annabeth periodically to tease those of Percy. Their guys keep in shape.