Anne Llewellyn Evans, Shinto Norito: A Book of Prayers
Thomas P. Kasulis, Shinto: The Way Home
Sokyo Ono, Shinto: The Kami Way
Some pertinent scholarly works
Anything by Mikael Adolphson. Seriously. But probably start with The Teeth and Claws of the Buddha. He debunks some major stereotypes about Japanese religion in his historical writing. The Gates of Power is his major work.
Mark Teeuwen and Fabio Rambelli (eds.) Buddhas and Kami in Japan: Honji Suijaku as a Combinatory Paradigm