What are common patterns for integrating REST apis?

This is related but not the same as design patterns for building REST apis. Example integration patterns might include:

- use of callbacks to pass data between systems - warehousing entities in some kind document store - use of reverse proxies to grant limited authorization - creating an endpoint as a view of an existing, more complex endpoint perhaps from a vendor

Are there other integration patterns common in various deployments?

Any good books / blogs / experts on this topic to read / subscribe / follow?