The official 4th edition of Linux Device Drivers (LDD) from O'Reilly Media was never actually published, despite being assigned an ISBN and listed on some retail sites with a 2017 release date. The authors confirmed that the publisher decided not to move forward with a new edition, even though they have continued to maintain the example code from the 3rd edition on platforms like GitHub.

1. Introduction to device drivers
2. Device driver basics
3. Char drivers
4. Block drivers
5. Network drivers
6. Kernel and device model
7. Device files and file operations
8. Advanced char driver operations
9. Advanced block driver operations
10. Network driver operations
11. Interrupt handling
12. DMA and scatter-gather I/O
13. I/O port access
14. PCI drivers
15. USB drivers
16. Platform and memory management
17. Power management
18. Debugging and performance
19. Advanced topics

The Myth of the 4th Edition

GitHub and code examples

• Many developers and instructors have created GitHub repositories that:

  A bot scraped the repo and compiled it into a polished, indexed PDF. It spread through Slack channels and Discord servers like wildfire. It was the first time in twenty years that a junior dev could look at a USB-C Alt Mode driver and actually understand the handshake logic. The "book" never truly finished. It became a rolling release