“The older Nico got, the more juvenile Percy seemed to him, though Percy was three years older. Nico found his sense of humour equal parts endearing and annoying. He decided to concentrate on the annoying.”

“So,’ Nico said, ‘since we’re going to be spending at least a year seeing each other at camp, I think I should clear the air.’ Percy’s smile wavered. ‘What do you mean?”

“Just leave her alone. You're annoying her.'
'I'm not annoying her. She doesn't even know how to be annoyed. She's, what, a week old?'
'She's three months.'
'She's three months in our years, but what is she in baby years?”

“What if a sense of humour is like hair — something a lot of man lose as they get older?”

“Nico found a sort of freedom in knowing that eventually, no matter what happened, he would end up at the foot of his father’s throne.”

“He’d learned years ago it was better not to dwell too much on who was related to whom on the godly side of things. After Tyson the Cyclops adopted him as a brother, Percy decided that that was about as far as he wanted to extend the family.”

“Please!’
That word didn’t make sense to Nico. The Underworld had no mercy. It only had justice.
‘You’re already dead,’ Nico said. ‘You’re a ghost with no tongue, no memory. You won’t be sharing any secrets.”

“It is the older generation who foster in a child an early and most unnecessary sense of guilt, of sinfulness and of wrongdoing. So much emphasis is laid upon petty little things that are not really wrong, but are annoying to the parent or teacher, that a true sense of wrong (which is the recognition of failure to preserve right relations with the group) gets overlaid and is not recognised for what it is.”

“He [Nico] regarded Jason, as if waiting for an attack. 'If the others found out-'
'If the others found out,' Jason said, 'You'd have that many more people to back you up, and to unleash the fury of the gods on anybody who gives you trouble.”

“You go to him for advice? He’s only what? Five years old? I swear I own older sweaters. (Tory)”