About This Book From within the brilliance of a crescent moon, the silhouette of a unicorn spoke to him. The enchanting voice instructed him to seek the Child of Light. -- Bruce R. Cordell, Lady of Poison (2004) here are many ways to detect the presence of a unicorn in your own backyard, without the need for expensive electronic equipment (leave that to the greenhorn rangers) or a virgin maid (leave her to the hopeless romantics). The most obvious is via the faculty of sight. When conditions of poor visibility preclude this approach, the "third eye" of intuition is commonly employed to track down the elusive beast. This book, however, will focus on the immense potential of the human ear. It is a little-known fact that, with listening practice, the human ear can be a peerless tool for perceiving unicorns. (The converse principle -- that the unicorn ear is a peerless tool for perceiving humans -- is, if true, a fact so little- known as to be undocumented.) Even those unicorn fanciers with hearing loss or profound deafness will benefit from the wealth of knowledge contained herein. Just as our old friend the blind Mexican cave fish (astyanax hubbsi) responds to moving