I've never been a big DC fan, but Blackest Night - Brightest Day had grabbed my attention. Looking to get caught up, I was given the following extensive list of trades. Not sure I trust the order 100%, but its a few more than I had anticipated to say the least. As such, the short reading list recommended to me was: Secret Origin -> Rebirth -> Sinestro Corps War 1 & 2 -> Blackest Night. Any other volumes in the list that could be considered vital?
1. Green Lantern: Rebirth 2. Green Lantern: No Fear 3. Green Lantern Corps: Recharge 4. Green Lantern: Revenge of the Green Lanterns 5. Green Lantern Corps: To Be a Lantern 6. Green Lantern: Wanted – Hal Jordan 7. Green Lantern Corps: A Darker Shade of Green 8. Green Lantern: The Sinestro Corps War Vol. 1 9. Green Lantern: The Sinestro Corps War Vol. 2 10. Green Lantern: The Sinestro Corps War Vol. 3 – Tales of the Sinestro Corps 11. Green Lantern Corps: Ring Quest 12. Green Lantern: Secret Origin -Prelude to Blackest Night Arc 13. Green Lantern: Rage of the Red Lanterns 14. Green Lantern Corps: Sins of the Star Sapphire 15. Green Lantern: Agent Orange 16. Green Lantern Corps: Emerald Eclipse -Blackest Night Arc 17. Blackest Night
18. Green Lantern: Blackest Night 19. Blackest Night: Green Lantern Corps 20. Blackest Night: Tales from the Corps - Misc tales for each of the lantern groups 21. Blackest Night: Black Lantern Corps Vol 1 - Batman, Superman, Titans 22. Blackest Night: Black Lantern Corps Vol 2 - Wonder Woman, JSA, Flash 23. Blackest Night: Rise of the Black Lanterns - Misc characters