Does Harper Collins take the writing from the agents or do you need to write the whole book and then give it to the agent and send it to HarperCollins?

Answer 1

If you want a book published, you have to finish it unless you're already famous like Stephen King or Nora Roberts. They can get away with just giving a publisher or agent their idea for a new book. Everybody else has to prove they can actually write a book and finish it.

Answer 2

HarperCollins typically works with literary agents who submit book proposals on behalf of authors. Agents help authors refine their book ideas before submitting them to publishers like HarperCollins. It's rare for authors to submit directly to major publishers without representation.