I'm interested in books (or other teaching resources) that instruct in the building of illusions. I have been performing platform magic for about 5 years, but my interest in complicated apparatus has been mild at best; I have only a scant knowledge of how most stage illusions work. However, a good friend of mine, and an accomplished builder, is keen to build an illusion with me, and I'm thinking it would be a good challenge.
One illusion in particular that has captured my interest is that of a floating assistant, whereby the magician stands or kneels before a young lady. I've seen this performed outdoors--it has an "impromtu" feel to it. Can anyone point me in the right direction in terms of what books and manuals to begin researching?