Do TV game shows give you the needed study information?

Let's say the show Jeopardy for instance. Where do they obtain all the information to answer those questions? What books do they read to get the information? Is the information provided by the game show?Do TV game shows give you the needed study information?
No, the contestants are incredibly knowledgeable people. There's something in the way they store information in their brain, that they can recall it in a matter of moments.



In fact, giving contestants the material before the show is frowned upon, if not downright illegal. They tried scripting game shows beforehand in the 50s, and there was a huge scandal.



(The kids on Are You Smarter than a 5th Grader actually do get textbooks to study from before the show, but this is legal, seeing as they're not actually contestants)Do TV game shows give you the needed study information?
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