Greg Kroah-Hartman has been building the Linux kernel since 1996 and started writing Linux kernel drivers in 1999. He is currently the maintainer of the USB, PCI, driver core and sysfs subsystems in the kernel source tree and is also one half of the -stable kernel release team. He created the udev program and maintains the Linux hotplug userspace project. He is a Gentoo Linux developer as well as the co-author of the third edition of the "Linux Device Drivers" book and a contributing editor to Linux Journal. He also created and maintains the Linux Device Driver Kit. He currently works for SuSE Labs/Novell, doing various Linux kernel related tasks.
"When you are ready to build your own linux kernel this is a great book to read! Greg achieves his goal of providing lots of kernel building information in one easily useable source. He explains without being wordy and lets you learn from his ample experience...If you are a kernel hacker the material is a bit light. However, if you have never built a kernel before you will save hours by this one read. I particularly like the reference style because I can study as much as my brain can absorb, make notes, and come back when I have a question."
--Leam Hall, Amazon.com