Shadowrun

Shadowrun Runners Companion (Shadowrun Core Character Rulebooks)
$34.99
Runner's Companion for 4th edition Shadowrun is a very good book to have. I introduces all of the Metatypes, Vampires, AI's, Drakes, and sapient critters, as well as offering advice on Shadowrun in general.

It also has Lifestyle options, more Qualities, SURGE qualities, and so on.

All in all, a very good book to have.

Shadowrun Book #1: Born to Run
$6.99
I was really excited to see that someone brought the series back, but I was a bit disappointed. This book seemed more like it was written for a 13 yr old than I remember the others being. For what it was, I liked it. I will get the other ones as well in hopes that it gets better because I REALLY loved the old ones.

Shadowrun
$19.99
This game has to be my most favored game i have ever bought. I've been playing it for 2 years stright, now, and i have never gotten tired of it. Just make sure you have an Xbox Live account.

Shadowrun Unwired (Shadowrun (Catalyst))
$34.99
Honestly, I do not know where to begin. This book is overly complex and hard to understand, at least at the beginning.
The book takes 2070's wireless technology and incorporates real world networking exploits and hacker trick
(like DDOS and bot-nets) and gives them Shadowrun rules. If you are a realist junky this book is for you; if you
treat Matrix combat like the movie Matrix, then avoid this book.

The book really shines in the Technomancer section. Giving them a work up similar to Shamans, Technomancers gain some
real good Echos (their version of Metamagic) and even gain the Technomancer version of spirit guides.

All in all Unwired is a clunky book, with more detail then necessary for a hacker, while buffing up Technomancers.
If your game has one, or you are playing one, get this book. Otherwise, it is not necessary for you.