I bought this (at the writers recommendation no less!) as an add-on for No Stars in Sight - and it works just fine. It's mostly an array of additional game mechanics usable with No End in Sight that are equally usable with NSIS. They inlude rules variants, expansions and system add-ons to expand and increase detail. Some are of more limited use than others, but many can be uased at will - as a useful hint the writer provides comments on each new rule that explain what changes the new rule will have on the players game. This is a useful and eimple expansion, and is (like NSIS) simply & clearly written and quite useful.