What challenges does percy jackson face in chapter 15?

book??? there is the lightning theif, the sea of monsters, the titans curse, the battle of labryrinth, the last olympian, the lost hero, the sun of neptune, the mark of athena, the house of hades, the blood of olympis.  its an entire series witch one are you talking about

answer: ok heres what i got on google

explanation: to recognize illness in frogs, toads, newts, or salamanders, look for the following signs:

inactivity or unusual behaviors. the first thing you might notice in your amphibian is abnormal behavior or appearance.

gradual or sudden weight loss.

body/abdominal bloat.

skin blotches.

eye cloudiness.

edema.