woodworking, building a log cabin, metal working, several gardening books such as square foot gardening, Ruth Stouts no work gardening book, books on raising cattle, horses, sheep, rabbits, chickens etc.
Also make your own library...what you say? Several years ago I purchased several large 3 ring binders and started printing out stuff that I found relevant. Most were short several page pamphlets etc. I then took them and put them into 3 ring binders. I believe I have 3 of them if I recall.