[xvilka]

This book is missing very actively developed reverse engineering framework radare2 [1], which is supporting not only x86/x86_64 but also arm, mips, ppc, avr, arc, 8051, TI tms320c55x family and even more!

[1] http://rada.re/

[awhitworth]

The title of the book is "X86 Disassembly". It was only ever intended to cover x86. x86_64, mips, ppc, etc are all expressly out of scope.