Rick Riordan

"It seemed weird calling a teenager 'sir' but I'd learned to be careful with immortals. They tended to get offended easily. Then, they blew stuff up."
"She'd also called me brave...unless she was talking to the catfish."
"Families are messy. Immortal families are eternally messy. Sometimes the best we can do is to remind each other that we're related for better or for worse...and try to keep the maiming and killing to a minimum."
"In a way, it's nice to know that there are Greek gods out there, because you have somebody to blame when things go wrong. For instance, when you're walking away from a bus that's just been attacked by monster hags and blown up by lightning, and it's raining on top of everything else, most people might think that's just really bad luck; when you're a half-blood, you understand that some devine force is really trying to mess up your day."
"The sea does not like to be restrained."
"Suspecting and knowing are not the same."
"Names have power."
"If my life is going to mean anything, I have to live it myself."
"The real world is where the monsters are."
"Where's the glory in repeating what others have done?"
"Knowing too much of your future is never a good thing."
"The entrance to the Underworld is in Los Angeles."