Memory, Sorrow, and Thorn by Tad WilliamsRead about another entry on the list.
People have pointed out some similarities between Williams' four-book series and Martin's seven-book one. Including Mongol-esque horse warriors, monsters in the frozen North, pet wolves and a boy who likes to run along the rooftops. And in fact, Martin freely admits reading this series "was one of the things that inspired me" to write A Game of Thrones. Fantasy had gotten "a bad rep for being very formulaic and ritual," said Martin. "And I read The Dragonbone Chair and said, 'My god, they can do something with this form,' and it’s Tad doing it. It’s one of my favorite fantasy series."
--Marshal Zeringue