Working/performance based - I do working ASH classes and Campdrafting which is similar to working cow horse.
General training, problem solving, etc. Would be great. Would also be happy for just general riding stuff, or trails.
Not books that go super into philosophical stuff, mostly practical, use-able stuff.
Also not ones that are hard to find in the US as you can bet I won't be able to find them in AUS! I can order off Amazon though.