Final answer:
The main character is helped by a professor in the book 'The Golden' to find out what happened to his cousin.
Step-by-step explanation:
The book in which the main character is helped by a professor who works with foreign reporters to figure out what happened to his cousin is The Golden by Apuleius.
In "The Golden," the protagonist, Lucius, experiences a magical transformation into a donkey. The story revolves around his adventures and the quest for redemption. There is no mention of a professor, the search for a cousin, or assistance from foreign reporters in the original narrative. If you have details from a different book in mind, please provide more accurate information so I can assist you appropriately.
Thus the main character is helped by a professor in the book 'The Golden' to find out what happened to his cousin.