Preaching is the Essence
Kirtan, book publishing, and thus distribution also have been accepted by Saraswati Thakura and other great acharyas as service in the line of raganuga (also rupanuga ). To write about the Lord is also kirtan and similarly to preach (to assert and convert others) is also kirtan (when our preaching is performed for the pleasure of Krishna and His pure devotees it is kirtan ).