Here you can download the Linux Kernel Crash Book, in PDF format. The book is 182 pages long, contains 113 screenshots and weighs 4.87MB.

https://www.dedoimedo.com/computers/www.dedoimedo.com-crash-book.pdf

Below, you can find links to the original seven articles that comprise the Kernel Crash series, starting with LKCD and Kdump, via specific setup on CentOS and openSUSE, ending with collection and analysis of memory cores.