Story is a classic textbook by Robert McKee. It’s heavily geared toward screenwriters, but all the basic principles apply to fiction writing.
There are people who swear by McKee’s method. There are those who swear at it.
Frankly, this book is not my favorite, but it comes highly recommended by some people I respect, so maybe it’ll work for you. Robert McKee is very big in Hollywood, and I gather that a large number of screenwriters there have plunked down hundreds of bucks to listen to the Great Man talk for a weekend.
Buying the book is cheaper, and if you don’t like it you can always foist it off on one of your friends.