The Titan's Curse (Week 2)

Well, it's my second week reading into the book The Titan's Curse. And the plot is starting to stir up a little bit. From what I have read this week, I think that the "mission" is starting to form. I was surprised when the Oracle( a mystical fortune teller) said that Artemis, the hunting goddess, was captured by a ferocious monster beast. The prophecy said:
Five shall go west to the goddess in chains,
One shall be lost in the land without rain,
The bane of Olympus shows the trail,
Campers and Hunters combined in prevail,
The Titan's curse must one withstand,
And one shall perish by a parent's hand.
Another thing that surprised me is when they said many monsters are awakening and could be used as weapons to overthrow Olympus.
Some questions I have are, who is the "one that will be lost in the land without rain"? The "land without rain" is possibly a desert? Also, I'm wondering who will be the campers and hunters that will set out on the mission to save Artemis? I was very pleased with the book and hope to find out what will happen soon.
-Connor