I.D. - That Indestructible Something [Adventure, Human, Transformation, Sci-fi?]

I.D. - That Indestructible Something is shaping up to be quite an interesting transformation adventure story. The author has written many stories where humans turn to ponies, but this time, the premise is somewhat different.
A young woman awakens transformed into an Equestrian pony - yet no other human being can perceive her new body in any way whatsoever. With clumsy hooves, but a bright mind, Gregoria Samson must trust in herself to discover the incredible, monumental truth behind her impossible change.
Acknowledgements for this story are numerous and range from Franz Kafka to philosopher Nick Bostrom. The author says her goal is "to blow minds".