How does it work in the US? Do the different legislatures typically publish their own law books or is that typically up to private ventures to handle? Here in

How does it work in the US? Do the different legislatures typically publish their own law books or is that typically up to private ventures to handle? Here in Scandinavia it seems the governments and other legislative authorities publish laws and rules on their home pages and it is then up to the publishers to keep track of what to put in the law book. Or not, because there are too many laws so a selection has to be made as it won't fit in a single volume. Different publishers then have different selections and annotations.