Most states new to gambling have enacted laws that copy large parts of the Nevada statutes verbatim. Those states have inherited the problems surrounding the vagueness of important parts of the Nevada statutes. Outside of Nevada, and to a much lesser degree New Jersey, there are very few reported court decisions interpreting these statutes. So we're left with a situation in which it's hard to predict how a number of important questions might be decided. For the most part, there's no clear reason that would lead other states to deviate from the interpretations that have been made by the Nevada courts, but their courts would be free to do so.
Beat the Players (Bob Nersesian is the correct spelling of the authors name), together with Robert Loeb's books Gambling and the Law, and Blackjack and the Law, cover the subject about as well as anyone reasonably could, but their authors speak candidly about how many issues are unresolved.
"Spooking" is usually defined as the reading of a hole card by a person not seated at the table, who signals the value to a team mate who is playing. I don't know what form of spooking other than "team spooking" could exist. A number of authors have stated the opinion that spooking is "probably illegal," but that can't be said to be more than an opinion. There is no citable court or administrative decision on point that actually decided a controversy. My own reading of the statutes is that there's no sound reasoning to distinguish spooking from the reading of hole cards by seated players, the legality of which is not by now generally considered open to serious question. But again, that's only an opinion. Spooking would have to be considered hazardous to one's health under the current unsettled state of the law. And not only for the reason exemplified by the actions of Lefty Rosenthal, fictionalized in the movie "Casino" as Ace Rothstein. Please see the past threads on this topic, I don't want to enter into a new debate.