In 2022, Penguin Random House wanted to buy Simon & Schuster. The two publishing houses made up 37 percent and 11 percent of the market share, according to the filing, and combined they would have condensed the Big Five publishing houses into the Big Four. But the government intervened and brought an antitrust case against Penguin to determine whether that would create a monopoly. The judge ultimately ruled that the merger would create a monopoly and blocked the $2.2 billion purchase. But during the trial, the head of every major publishing house and literary agency got up on the stand to speak about the publishing industry and give numbers, giving us an eye-opening account of the industry from the inside. All of the transcripts from the trial were compiled into a book called The Trial. It took me a year to read, but I’ve finally summarized my findings and pulled out all the compelling highlights. I think I can sum up what I’ve learned like this: The Big Five publishing houses spend most of their money on book advances for big celebrities like Brittany Spears and franchise authors like James Patterson and this is the bulk of their business. They also sell a lot of Bibles, repeat best sellers like Lord of the Rings, and children’s books like The Very Hungry Caterpillar. These two market categories (celebrity books and repeat bestsellers from the backlist) make up the entirety of the publishing industry and even fund their vanity project: publishing all the rest of the books we think about when we think about book publishing (which make no money at all and typically sell less than 1,000 copies).