Analysis of information sources in references of the Wikipedia article "American Gods" in English language version.
As for withholding information... before the Internet, I'd tell anyone anything they wanted to know. ('Who's the missing member of the Endless?' 'Destruction.' 'Oh.') After the Internet, I would try and avoid answering some direct questions because it might spoil things for people. 'Why did Delight become Delirium?' 'Who's the Forgotten God?' -- they're questions I would happily have answered for anyone who asked at a signing 20 years ago, because it wouldn't have gone any further, not in any way that mattered. Not any longer, because one day I may tell those stories. (If I knew for sure I wouldn't tell them, then I'd happily answer people now.)