I've read the book and I agree that a lot of it concentrates on cases which are rather unusual for a common person. Not all of it though.
E.g. evidence rules mean you can be committing a felony just by deleting an email that some prosecutor may consider important - even if you haven't been under investigation at the time. And you can be investigated for things as simple as depositing sums under $10000 in the bank on routing course of business - just because it looks like "structuring". And you can also be prosecuted if you make any false statement to a government employee, no matter if it relates to any crime.
(those are both real examples from the book...whether there was a great deal of intent in the lobster tail case is disputed, but it was a pattern of shipments involving thousands and thousands of pounds of tails)