You don't need to manually include your controllers, just follow the rspec naming conventions and describe the desired object and everything will work fine.
Your controller spec should be named books_controller_spec.rb
. That is the exact same name as your controller with a _spec
added at the end. This is not a hard requirement but a highly suggested convention as a book_spec.rb
really implies a Book
model spec rather than a controller.
The critical part is that in your spec you describe the desired object, e.g.
describe BooksController do
#...
end
You might also want to have a look at the rspec-rails gem which provides some useful generators for specs. Ideally you integrate with Rails so whenever you generate a new model or controller a new spec is created for you as well.