I applied online. The process took 2 weeks. I interviewed at HarperCollins (New York, NY) in Aug 2019
Interview
Then interview process started with a brief phone call to schedule a date to meet in person. The in-person interview started with HR and then moved along to Barb (she's wonderful) There, we discussed my interest in book publishing, my strengths and weaknesses and what I hoped to get out of the internship and taking a look at my portfolio. Overall was a very pleasant experience (I was hired and heard back fairly quickly)
Phone screening and interview with managers who I would be working with if I got the internship. The process was brief but comfortable and the recruiter made an effort to make sure I was ready and prepared.