On the Role of Creation and Origin Myths in the Development of Inca State and Religion
An article by Tarmo Kulmar that discusses Inca mythology.

Inkan Religion
This article discusses Incan religion and mythology.

Encyclopedia Mythica: Inca Mythology
List of Inca gods and mythical characters.

Mythology of Peru
Chapter 7 of Lewis Spence's Myths of Mexico and Peru (1913). This site takes time to load but is full of information.