title: Waiting for one publish to finish before starting another
body: <p>I have yet to find a relatively good solution for this. Maybe the community can help?</p>
  
  <p>I'm pulling data into my meteor app from some restful end points. One builds on the other. For example..I hit one end point and get a collection of authors. then I need to hit a second endpoint to pull the books each of the authors have written. </p>
  
  <p>Right now I have two separate publish functions on the server side to get the sets of data, however the second one relies on the data from the first. (My initial foray in my app was simply to do it all in one publish, but this felt like not the best architecture)</p>
  
  <p>Is there any way to subscribe to another publish from within another publish server side? Or, some other method of checking that i can do?
  So far the internet and stack overflow have yielded little results. I am aware of the publishComposite packages available.. but they seem relatively heavy handed and don't necessarily seem applicable to what I'm trying to do. Any advice would be greatly appreciated </p>