1st: Two Arms And A Head, reviewed by AmandaFromBethlehem. Amanda is active in the Philadelphia ACX community. This is her first year entering the Book Review Contest, and she is currently working on a silly novel about an alien who likes thermodynamics. When she's not writing existential horror, she practices Tengwar calligraphy and does home improvement projects.
2nd: Nine Lives, reviewed by David Matolcsi. David is an AI safety researcher from Hungary, currently living in Berkeley. He doesn't have much publicly available writing yet, but plans to publish some new blog posts on LessWrong in the coming months
3rd: How The War Was Won, reviewed by Jack Thorlin. Jack previously worked as an attorney at the Central Intelligence Agency, and is now an assistant professor at the University of Arkansas School of Law.
First place gets $2,500, second place $1,000, third place gets $500. Email me at scott@slatestarcodex.com to tell me how to send you money; your choices are Paypal, Bitcoin, Ethereum, check in the mail, or donation to your favorite charity. Please contact me by October 21 or you lose your prize.