This volume, book three in the trilogy, is all about the psychology in magic. Mechanics alone, a sleight or move, are not sufficient to produce a strong magic effect. Dexterity by itself is more like juggling. Only if misdirection, the psychological aspect of deception, is added into the mix, will one be able to create a truely magic experience.
There aren't many good works on misdirection. This is one of the must read ebooks, a classic in the theory of magic. A shorter but modern discussion of misdirection can be read in Pocket Power by Jarle Leirpoll.
1st edition 1975; 221 pages.
word count: 71809 which is equivalent to 287 standard pages of text