(1) The law books were pretty expensive...but some minimum number of public libraries had copies of the books in their Reference (may not be checked out) sections?
(2) The expensive law books were pretty much all in subjects that didn't concern you - building code for steel mills, regulations for operating an ocean freighter, depreciation rules for oil refineries?
(3) "The letter of the law" was freely available - but it's a muddled mess of vagueness, insider jargon, "gotta be a lawyer to understand the mental framework here", and just so hellishly long that you would have to devote your life to some sub-sub-sub-section of the law (plus the administrative regulations based on it, rulings in related court cases, etc.) to have any chance of knowing and understanding it?