The Kybalion is more representative of the New Thought movement than what has been historically been called "Hermetic". Which is really saying something considering that term is applied to a wide variety of texts! No better place to start than the original Graeco-Egyptian texts. Hermetica translated by Brian Copenhaver and Hermetica II translated by M. David Litwa are the best collections and the Way of Hermes by Clement Salman et al is also high quality. The Egyptian Hermes by Garth Fowden gives some historical context.