Skinwalkers at the Pentagon (book, 2021).
allegedsource_actorPrivate Aerospace Contractors
Insider account by Lacatski/Kelleher/Knapp; primary source for the recovered-material and craft-custody claims.
Published 2021 and cleared for release by DoD, the book is the authoritative insiders' account of AAWSAP. It details the Tic Tac incident, Skinwalker Ranch phenomena, military-base breaches, and — most contentiously — that Bigelow retrofitted his Las Vegas plant (~$1M) to receive recovered exotic materials. These custody/material claims are first-person insider assertions, not independently documented, placing them in the [CLAIM] tier.