I'm the author of O'Reilly's "Learning Go". Here are the last 13 months of paperback book sales:

- Mar 2026: 124

- Feb 2026: 140

- Jan 2026: 157

- Dec 2025: 306

- Nov 2025: 484

- Oct 2025: 218

- Sep 2025: 176

- Aug 2025: 136

- Jul 2025: 317

- Jun 2025: 230

- May 2025: 237

- Apr 2025: 165

- Mar 2025: 367

Sales are certainly down, but it has gone up and down in the past.

Since the 1st edition came out in 2021, it has sold roughly 20,000 copies (about 10,500 English paperback copies, 3,800 ebooks, and 6,700 translated copies). The 2nd edition came out in 2024 and has sold roughly 13,000 copies (about 8,300 English paperback copies, about 3,000 ebooks, and about 1,600 translated copies).

Most of the money comes from O'Reilly's online platform, not from book sales. That has been declining lately, partially because the latest edition is now over 2 years old, but also I suspect that people are cancelling O'Reilly subscriptions and just relying on LLMs (which have indexed all of the books and used pirated copies to do so).