Thanks Bill.
It's a finesse bass fishing technique that was pioneered in Japan, although the technique has been around for a long while in various forms. There are similar presentations for lake trout, etc. that came before spybaiting. Usually one would use a sinking prop bait on very light line (2-6lb.) and target suspended fish in clear-ish water. The lure must sink evenly and flutter on the fall (not nose down) and you just count it down to the desired depth. Retrieve the lure at a snails pace. There are a lot of videos online that demonstrate the technique. It is deadly in certain situations (it is known as a good presentation in highly pressured waters, but mileage may vary.)
The minnow chaser works well for spybaiting. The lure has a nice wobble to it if you follow the recipe in the book.