Originally posted by: Merithynos
David Brin's first Uplift Trilogy - Sundiver, Startide Rising (Hugo Award, Nebula Award), The Uplift War (Hugo Award)
Vernor Vinge's A Fire Upon the Deep (Hugo Award), and it's prequel A Deepness in the Sky (Hugo Award)
Greg Benford's Galactic Center series - In the Ocean of Night, Across the Sea of Suns, etc
I'll have to second the recommendations for Spin (and its sequel, Axis) and The Mote in God's Eye (and again, its sequel The Gripping Hand).
	
	
		
		
			Originally posted by: jonks
The Forever War by Joe Haldeman.
It's a classic sci-fi novel, pretty short.  A vietnam war allegory I believe, as was ender's game.  The sequels which I have not read were far and wide not liked by critics or fans so you can just stick to the original, which was terrific.
		
		
	 
Forever War and Forever Peace both received the Hugo and Nebula awards for best novel the year they were eligible...I think Forever Peace was the only sequel I read, but I remember it as pretty good, and getting both the Hugo and the Nebula is a pretty good indicator of critical acclaim (at least within the genre).