If you've dipped into the Wars rules, want to build up your background knowledge, can't wait for the next supplement to arrive and aren't adverse to owning a collectible card game... then I recommend getting your hands on Incursion and Nowhere to Hide, the first two sets of the Wars CCG. It seems as good a time as any, as you get both sets cheaply from various sources - including eBay and various online trading card dealers. I just picked up 36 pack booster boxes of Incursion and Nowhere to Hide for $47 (or just over £25)... a steal, basically. That's more than 1000 pieces of background material - characters, locations, planets, ships, vehicles, weapons, etc.