If you're having no joy with a farrier, you could try an equine podiatrist. The Equine Podiatry Association is a good start. An EP cannot shoe a horse but can trim and offer advice on hoof care.
The Jaime Jackson book is about horse boarding not horse handling.
Monty Roberts is good but (and I know I'll get shot down for this by someone) maybe you should have a look at the Parelli Programme. Natural horsemanship is a way of being with your horse - it doesn't "belong" to Parelli, Roberts, Rashid or anyone else except maybe horses. The Parelli PROGRAMME is useful for folk starting with horses, because it starts with the basics for the HANDLER. It's not a horse training programme, it's a human training programme. You don't need all the equipment, although a good rope halter and a 12ft line is pretty invaluable because it allows the horse to drift and move its feet if it is anxious, without it getting away. The L1 covers fundemental concepts like pressure and release, approach and retreat, timing and feel.
If you can get hold of a Level 1 pack on ebay and watch the DVDs, you'll get a grounding in the basic skills. PP calls it the Seven Games but it's about understanding horse behaviour, building a solid relationship with your horse (on which everything else that you do with her will be based) and learning a language that your horse can understand. She already knows the language and how to play the "games" because she's a horse - it's YOU that needs training
Remember, EVERY encounter you have with your horse counts. From the moment you come within sight and sound of your horse, you can make it positive or negative for her, so be aware of her. She will give you constant feedback through her body language about how she is feeling - learn to accept it for what it is and acknowledge it.
Horses forgive (thank God), so if you make a well intentioned mistake, she'll forgive you, but she won't forget, so it will pay you to invest a wee bit in this. You won't regret it because horses are such wonderful creatures. Even tiny ones
Or maybe especially tiny ones. Just remember that, even though she's small, she's all horse.
Sorry to go on - but I hope you have lots of fun with her, she looks a sweetie