First Aid is a huge part of the game that your character is bound to require at some point sooner or later, yet it's actually a taught skill with many levels of training. This would make for an ideal (and likely) research book to improve on this skill, and perhaps to learn more advanced techniques. It could also be a skill that the more your character works at, the better s/he gets at it ~ which is how it happens in the real world, as nothing helps with First Aid training like real-life, hands-o