The book may claim to chronicle the "greatest conspiracies of all time," but there's a decidedly 20th-century bent to Vankin and Whalen's compilation--not that there's anything wrong with that. Many of their selections are familiar territory--the Kennedy and King assassinations, government suppression of UFO data, questions about Marilyn Monroe's suicide--but this edition has been updated to include information on more recent events like the death of Princess Diana and the Oklahoma City bombing. (Although not without some disheartenment: "Back in the good ol' days when conspiracy theorists were still considered crackpots," they lament, "it actually took some kind of evidence to get this kind of frenzy under way.... Now anytime some poor sap dies every frat boy with an Internet account races to be the first in his quad to post the conspiracy of the moment.") The individual essays are written in savvy, journalistic prose, and the authors freely admit that they don't have the answers to any of these mysteries. But that's part of the entertainment value of such historical paranoia--you're always free to imagine some new twist.