D20 Modern setting.

The list author says:
	"The Core book. If you're planning on running the modern set with no previous experience of any system it's a neccesity. Although the class system is unique, so it's best to get this."

The list author says:
	"Urban Arcana is essential for making a more monster and magic orientated campaign, it also specifies non-human races. It also softens the conversion of 20Fantasy to 20modern and visa-versa. Brilliant."

The list author says:
	"More for the DM than player. Has a very handy "NPC group" section which can cover for you should your players run off on tangents. Very handy if you're none too keen on rolling enemies up/lazy. Heh."

The list author says:
	"Handy if you have gun-freaks in your group. But it's blessing doubles as a curse, players spending an hour on a gun gets a bit tedious, though it does add to realism :S."

The list author says:
	"See above. As I said, the gun-nuts will love it. It's also a handy reference if you're a writer, but I don't think that's the matter at hand."

The list author says:
	"An excellent book, adding a surprising amount to any setting. When used in collaberation with Cyberscape and Future tech (Even Apocalyspe) it can make any setting impossibly expansive."

The list author says:
	"Cyberscape is one of best suppliments available at the moment, and I've not regretted buying it once. It has brilliant rules about Netrunning (Basically shadowrunner) and attachments. Excellent read."

The list author says:
	"I found past handy. I'd allowed the PCs to have tech which could throw them through time/space (Possibly too widescale, I spoil 'em.), the spells were handy as were the older weapons."

The list author says:
	"Excellent Trade/points scheme, and handy society and illness notes. Definately a stepping stone to a Fallout-Esque campaign."

The list author says:
	"Not sure whether this is listed on Amazon, but it's the "Modern Player's companion". Has some good notes on multiclassing, good new classes and occupations too.  There's a future companion out too."

The list author says:
	"Great for buffing out a future campaign."

The list author says:
	"Another book handy for when you're all out of ideas, 40 large maps, each with supporting NPC's etc."

The list author says:
	"The most recent (and in my opinion ESSENTIAL) expansion on Modern. This expands EVERYTHING, the conspiracy, Feats, FX, classes and equipment. As well as adding an awesome background to any rw campaign"