Book excerpt: Slocum is under the gun… John Slocum is in Reno to see a man about a horse--a broke-down nag given to him as payment by a hornswoggling horse trader. But his attempt to get his money’s worth may end up costing him even more. Because the only way Slocum is going to get anything out of this deal is to cross barrels with a pack of murderous mongrels known as the Terrors…