A good coauthor will make your job easier. He or she will help with all stages of the writing process, from initial brainstorming through final edits and marketing.

A great coauthor will inspire you to creative heights you could never reach on your own.

But when it’s -7º F and you’re fighting off a terrible cold, the best coauthor will pick up Thai food and snuggle under a blanket with you. You’ll want to keep that in mind when choosing your collaborator.