Reddit mentions of When There Is No Doctor: Preventive and Emergency Healthcare in Challenging Times (Process Self-reliance Series)

Fierce_Fox is right. FM manuals such as FM-217-76 Survival.....may be somewhat outdated but the information is reliable.
As a Medic/EMT my prepping focuses on my skill set with everything else falling close in line. I have a lot of information in digital format; both on USB and a small external drive. I have a small tablet that is in my BoB for reading documents and such.
At a minimum, here are my suggestions:
FM 21-76 Survival - Department of the Army
https://archive.org/details/military-manuals
SAS Survival Guide - https://www.amazon.com/SAS-Survival-Guide-Collins-Gem/dp/0061992860/ref=sr_1_1?ie=UTF8&qid=1483496552&sr=8-1&keywords=sas+survival+guide
The Pocket Prepper's Guide - Bernie Car
https://www.amazon.com/Preppers-Pocket-Guide-Things-Disaster/dp/1569759294/ref=sr_1_fkmr0_1?ie=UTF8&qid=1483496827&sr=8-1-fkmr0&keywords=The+Pocket+Prepper%27s+Guide+-+Bernie+Car
The Complete Disaster Home Preparation Guide - Robert Roskind
https://www.amazon.com/Complete-Disaster-Home-Preparation-Guide/dp/0130859001/ref=sr_1_1?ie=UTF8&qid=1483496881&sr=8-1&keywords=The+Complete+Disaster+Home+Preparation+Guide+-+Robert+Roskind
How To Survive the End of the World As We Know It-James Wesley,Rawles
https://www.amazon.com/How-Survive-End-World-Know/dp/0452295831/ref=sr_1_1?ie=UTF8&qid=1483496952&sr=8-1&keywords=How+To+Survive+the+End+of+the+World+As+We+Know+It-James+Wesley%2CRawles
Bug Out - Scott B. Williams
https://www.amazon.com/Bug-Out-Complete-Escaping-Catastrophic/dp/156975781X/ref=sr_1_1?ie=UTF8&qid=1483496991&sr=8-1&keywords=Bug+Out+-+Scott+B.+Williams
When There Is No Doctor - Gerard S. Doyle, MD -
https://www.amazon.com/When-There-Doctor-Challenging-Self-reliance/dp/1934170119/ref=sr_1_2?ie=UTF8&qid=1483497054&sr=8-2&keywords=When+There+Is+No+Doctor
The Ultimate Survival Medicine Guide - Joseph Alton, MD & Amy Alton, ARNP - https://www.amazon.com/Ultimate-Survival-Medicine-Guide-Preparedness/dp/1629147702/ref=sr_1_fkmr0_1?ie=UTF8&qid=1483497109&sr=8-1-fkmr0&keywords=The+Ultimate+Survival+Medicine+Guide+-+Joseph+Alton%2C+MD+%26+Amy+Alton%2C+ARNP
Last, but not least, The Zombie Survival Guide - Max Brooks
https://www.amazon.com/Zombie-Survival-Guide-Complete-Protection/dp/1400049628/ref=sr_1_1?ie=UTF8&qid=1483497158&sr=8-1&keywords=The+Zombie+Survival+Guide+-+Max+Brooks
The last one is more humor but it does have many great points and ideas.
A library that covered everything would be very heavy and take up a bit of space. For the minimum, at least 1-2 books on everything one will need to survive will still be a lot. These books should be read, reread, and read again. We can't memorize everything, but having this to go back on when needed is a great addition. There's tons of information online and downloadable for free.
Depending on one's skill set, then they may not need as much. Teach others in a group is a must. Can't have one person be the ONLY one who can do 'this' skill. IMO, research should always be the first step. So much information out there and it's free.