I read WordFreak a few years ago (before I discovered German games) and enjoyed it a lot. Fatsis is a very good writer, with a strong sense of character.
Because he got immersed in the pro Scrabble scene himself, rather than just writing about it from outside, he tasted “Scrabble-geekishness” himself. As a result, he is much more sympathetic to many of the oddballs he portrays than most writers would be when writing about geeks that have inter-personal skills issues.
Highly recommended.