US Book Output Topped 4 Million Titles in 2025, Driven by 38.7% Surge in Self-Publishing

The total number of books published in the US with ISBN numbers jumped 32.5% in 2025 to more than four million titles, according to Bowker data. Self-published works drove the surge, rising 38.7% to 3.53 million titles, while traditionally published books grew 6.6% to 642,242.