The challenge I automatically sign up for is Carl's "The 2012 Science Fiction Experience". Year in, year out, this is one of my favorites. There are no requirements except to read and write about science fiction. I am listing the books I think I will read for this experience. As I complete them I will add the link to the review. As I am reading, some of these might drop off the list and be replaced by others.
1. Foundation by Isaac Asimov
2. Demon Princes 1: Star King by Jack Vance
3. Demon Princes 2: The Killing Machine by Jack Vance
4. Demon Princes 3: The Palace of Love by Jack Vance
5. Demon Princes 4: The Face by Jack Vance
6. Demon Princes 5: The Book of Dreams by Jack Vance
7. Dumarest 1: The Winds of Gath by E. C. Tubb
8. Hooded Swan 1: Halcyon Drift by Brian Stableford
9. The Day of Their Return by Poul Anderson
10. Dune Messiah by Frank Herbert