James Patterson Inc.

This profile of Patterson is almost 10 years old, but still very much worthwhile. He hasn't gotten less successful in the intervening decade. If anything, the numbers in the story are out of date: they've probably tripled. 

Also note: the opening scene where Patterson is sitting down with the editor of Little, Brown (his main imprint) and the CEO of the whole damn company (Hachette) is ... not how most authors usually interact with their publishers. 

Furthermore: here's the Grand Central Publishing website, where Friday's guest Alexis Gilbert works. As you can see, they're a paperback subsidiary of Hachette. Scroll through some of their offerings. Which of these is not like the others?