Dan and Ezra consider the truly unbelievable growth in the number of books published in 2025, and hypothesize that there is a single, highly prolific author is driving the increase. Then they turn to the question of Bisac codes, a tool for categorizing and organizing books by topic.

Episode links:

Publishers Weekly: Book Output Topped Four Million in 2025

https://www.publishersweekly.com/pw/by-topic/industry-news/publisher-news/article/99943-book-output-topped-4-million-in-2025.html

Meg's Publishing Services: How Amazon Categories Work vs. Bisac Codes

https://www.megspublishingservices.com/mpsblog/rr2ggpxj0ikoy5um0wzraqic24bm7k

Book Industry Study Group: Listing of Bisac Codes

https://www.bisg.org/complete-bisac-subject-headings-list