I've been doing an occasional series for the excellent "Known Space: The Future Worlds of Larry Niven" website (also known as "Larry Niven Org"), called "The Complete Idiot's Guide to Known Space." Niven's fictional "Known Space" universe is impressively sprawling and despite being very reader-friendly and fun, it's massive enough to appear rather daunting to a new person who may not know where to dive in. To that end, I've been writing some overviews of different themes that crop up again and again within the stories.
The second installment just went up today. Check it out here, it's kind of fun.
Also, be sure to check out the site as a whole, it's great and well worth your time.