I made them small on purpose– so you can easily pack it. In the picture its next to my old Ranger Handbook which went everywhere with me when I was in uniform in the Army.
I also prioritized information. Even before the table of contents. I cover BREATHING first aid– do you know how to do a self-Heimlich? Then emergency bleeding. Because those two things you need ASAP if those emergencies occur. In the free APPs one of them was how to do CPR. Most people have only a passing idea how to do it.
From First Aid I move on to the other key survival skills. I also cover a phase most manuals don’t consider, but in an extreme emergency will be critical: how to scavenge.
This manual makes a great gift because it says: “I care.”