jdrakeh said:
- Traveller: The Classic Books
- Traveller: The Classic Supplements
- Serenity (if I have enough scratch left over)
- JC (if it's still in the bargain bin
Most of Classic Traveller's actual setting information is contained in the Supplements book, specifically the two Library Data books, and dibs and drabs from the Solomani Rim and Spinward marches books.
If you've never seen these books, here's the layout. The Library Data books are definitions of terms. A few things to make their debut there, but not a lot. The sector books are: one page of stats, facing page is the map. A little history is included at the beginning, and some minor notes are contained in the stats page if a planet is really unusual. Classic Traveller kept their bare bones customizable approach almost it's entire life. A far richer but still extremely spread out source are the three Journal of the Travellers Aid society books. The Classic Aliens contains pretty much all the info you need about each alien race. Each is stunning in their breadth and depth of info.
Now, if you're looking for long essays on the hows and whys of the Imperium, Classic Traveller ain't the place to get it unless you're willing to do all the peicing together yourself.
The Megatraveller books and (if you can find it) the issues of Megatraveller Digest (?) contain
much more in the way of detailed setting info laid out in an easy-to-find manner.
Far Future puts out a CDRom with all the canon Megatraveller books, but not the issues of the magazine. (If you can find it: Far Future's website is a screaming mess of stub pages and broken links).
The place to go for setting information is probably GURPS Traveller and the Spinward Marches book Behind the Claw (currently out of print; probably waiting for the 4rth ed revision). It has most of the pertinant setting info laid out in an easy-to-find manner.