Chapter N is no longer supported in the 2nd Edition ASL Rulebook, and all Chapter N pages have been deleted from reprinted modules. The new rulebook also includes (minor) material not covered in any previous issue of errata, making ownership of the 2nd Edition essential for compatibility with new products or other players who use the 2nd Edition. The 2nd Edition does reflect most, but not all, previous changes to the rules via an issue of replacement pages. There are also cosmetic differences such as larger typeface and improved layout.