'Win with the Stonewall Dutch' was indeed shortlisted to ChessPublishing's Book of the Year contest.
Both the two other finalists are from Quality Chess:
Marin's Grandmaster Repertoire: The English Opening. Since the first voting session, Quality Chess has announced that this series will become a trilogy (not two volumes as originally announced).
Schandorff's Playing the Queen's Gambit.
Surprisingly there have been considerably fewer votes in this final voting session than in the preliminary one (only 50 when I write this entry). Maybe those who voted for books that are now eliminated are not voting in this session (one very good reason would be not having read those left). In that case the final result may be very close to the preliminary one.