http://www.archive.org/search.php?query=creator%3A%22Goetschius%2C%20Percy%2C%201853-1943%22
Counterpoint applied in the invention, fugue, canon and other polyphonic forms; an exhaustive treatise on the structural and formal details of the polyphonic or contrapuntal forms of music, for the use of general and special students of music - Goetschius, Percy, 1853-1943
Free download. It'll help you with your counterpoint. There are other free books as well. Enjoy