Hilary Cotter's Replication Book
While travelling recently, I finally got to finish Hilary Cotter's book on SQL Server replication. What can I say? It's excellent work. If you are working with either Transactional or Snapshot replication with SQL Server 2000, this is the bible. Hilary provides a very clear description of every question in every dialog you are likely to see when configuring replication and gives wonderful insights into how it works internally. Highly recommended!