Why can no one write a truly advanced poker book ?

[Wilco23]

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in the case of no-limit hold 'em:

1. there's a ton of "basic" stuff that isn't in print


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Matt - I hear people say this all the time. I'm hoping your book will address these issues, and I'm planning on purchasing it asap. Could you just give even a brief generic of one such concept? I'm always curious as to what people mean when they make a statement like this. Thanks, and looking forward to the book.