You might try these two references:
This is an online Shinto Encylcopedia
Encyclopedia of Shinto - Home
In my case it raised more questions than it answered, but it can be very helpful.
This book is written for Westerners and is an easy and mildly entertaining read. There are some specifics, but even more hints on where to wander next when exploring Shinto, on both a spiritual and pragmatic/day-to-day basis.
"A Year in the Life of a Shinto Shrine" by John K. Nelson. Amazon has it, if your local bookstore doesn't.