Kroah-Hartman is a co-author of Linux Device Drivers (3rd Edition)[5] and author of Linux Kernel in a Nutshell,[6] and used to be a contributing editor for Linux Journal. He also contributes articles to LWN.net, the Linux news site.
Kroah-Hartman frequently helps in the documentation of the kernel and driver development through talks[7][8] and tutorials.[9][10] In 2006, he released a CD image of material to introduce a programmer to working on Linux device driver development.[11]