I have lots of military publications saved as PDFs. The US Army and Marine Corps provides for free tons of manuals of a massive number of niche topics. The ma

I have lots of military publications saved as PDFs. The US Army and Marine Corps provides for free tons of manuals of a massive number of niche topics. The majority of them are not applicable for most people, but there's a number of these manuals that I think are worth having on hand in case of long term outages or catastrophic events. Take this manual on radio operations from the Marine Corps: https://www.trngcmd.marines.mil/Portals/207/Docs/TBS/MCRP%203-40.3B%20Radio%20Operators%20Handbook.pdf https://www.trngcmd.marines.mil/Portals/207/Docs/TBS/MCRP%20... It basically goes over everything you need to know about radio theory and constructing antennas, and teaches these things more effectively than any other resource when I was recently learning about amateur radio. Other resources are long-winded and contain distractions, but military publications like these are distraction-free. Here's the modern version of the Army manual on survival (formerly FM 21-76): https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/ARN12086_ATP%203-50x21%20FINAL%20WEB%202.pdf https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/ARN1208... Survival, Evasion, Resistance, Escape Operations: https://static.e-publishing.af.mil/production/1/af_a3/publication/afh10-644/afh10-644.pdf https://static.e-publishing.af.mil/production/1/af_a3/public... Field Hygeine and Sanitation: https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/tc4_02x3.pdf https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/tc4_02x... First Aid: https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/ARN14135_TC%204-02x1%20C2%20INCL%20FINAL%20WEB.pdf https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/ARN1413... Base Camps: https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/ATP%203-37x10%20FINAL%20WEB.pdf https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/ATP%203... Carpentry: https://armypubs.army.mil/epubs/DR_pubs/DR_a/ARN35831-TM_3-34.47-000-WEB-1.pdf https://armypubs.army.mil/epubs/DR_pubs/DR_a/ARN35831-TM_3-3... Firefighting: https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/tm3_34x30.pdf https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/tm3_34x... Crowd Control: https://armypubs.army.mil/epubs/DR_pubs/DR_a/ARN35675-ATP_3-39.33-000-WEB-1.pdf https://armypubs.army.mil/epubs/DR_pubs/DR_a/ARN35675-ATP_3-... Advanced Situational Awareness: https://armypubs.army.mil/epubs/DR_pubs/DR_a/ARN34875-TC_3-22.69-000-WEB-1.pdf https://armypubs.army.mil/epubs/DR_pubs/DR_a/ARN34875-TC_3-2...