L & N Book
Joseph Morton is a former L & N Engineer who ran trains from Latonia to Louisville and back. He's written a book, Fast Freight to Decoursey, that talks about his experiences and the L & N over that territory.
I bought it, read it, and recommend it to you.
It's published by the L&N Historical Society. They're on the web here, or you can send $30 plus $4 postage to them at:
L & N Railroad Historical Society
PO Box 17122
Louisville, KY 40217