Answer:
What breaks on the water but never on the land?
So cold, damp and dark this place. To stay you would refrain, yet those who occupy this place do never complain.
Green arrows grow out of my sides. I go from yellow to white. My babies fly in the wind. What am I?
A precious stone, as clear as diamond. Seek it out whilst the sun's near the horizon. Though you can walk on water with its power, Try to keep it, and it'll vanish within an hour.
Its title means book.
If you can get this professional's attention you can get where you need to go for a price.