Finally there is way to route your query to secondary mongod
Just place the host and port of your secondary inside the mongoskin connection string like this
var mongo = require("mongoskin");
var database = mongo.db( "mongod://username:password@secondaryDatabasehost:port/database",{safe:true , slaveOk : true});
The slaveOk:true will allow secondary mongod to use for read only queries.Without this mongo wont allow to query from a secondary and gives you an error.
[Mongo error "$err" : "not master" ]