Answer:
"My dear young cousin, if there's one thing iv'e learned over the eons, it's that you can't give up on your family, no matter how tempting they make it" is on page 73.
"Don't worry about always coming in second, Jackson" is not actually in the book. The quote is from the movie based in the book.
Step-by-step explanation:
This questions are about the book Percy Jackson and the Sea of monsters, which is the second book of the Percy Jackson and the Olympians series written by Rick Riordan.
The second quote is not from the book, it is from the movie released in 2013 starring Logan Lerman and Alexandra Daddario.