If you're into x86-64 #assembly and like riddles and/or poetry, I highly recommend "xchg rax, rax" by xorpd.
https://www.xorpd.net/pages/xchg_rax/snip_00.html
xchg rax, rax: 9781502958082: Computer Science Books @ Amazon.com
raptor 
Digger7