Best of Orson Scott Card
- PastWatch (all-time best!)
- Ender's Game (close second)
- Seventh Son
- Alvin series (Red Prophet, Alvin Prentice, Alvin Journeyman, etc.)
- Homecoming series (the final one is a bit of a let-down, though)
- Enchantment (if you've read Russian fairy tales, you'll really enjoy this unusual and absorbing modern fantasy)
Skip Speaker for the Dead and go directly to the last in the Ender's Game trilogy (and you needn't bother with the "fourth and final" book in the series, either). Alvin in the "Seventh Son" series is another good character who recurs in his entire interesting series. The Homecoming series perks along with good character development till the final book, when it seems to sputter out. Oh, well. Enjoy!