A definate voice to be familiar with is the late
Jim Keith
Some of the works by him I've read:
Secret and Suppressed -1993
-collection of his own essays as well as Adam Gorightly's "Is Paranoia a form of Awareness" and John Judge on "the Black Hole of Guyana". Published by Feral House and as such is a more "cospiracy" focused
book though it is similar in style and perspective to the publisher's own
distopian anthologies, Apocalypse Culture (revised edition), Cult Rapture, and Apocalypse Culture 2, all of which are highly recommended as well.
The Octopus (The Secret Government and the Death of Danny Casalaro) - 1996, 2003 (revised ed.)
-written with Kenn Thomas of Steamshovel Press (all conspiracy-no theory). One of the first investigations into the mysterious first investigation of the PROMIS software saga by Danny Casalaro who was brutally "suicided". From the backrooms of the Reagan/Bush adminstration comes a story of data piracy, drug running, and the creation of the global surveillance network that still continues to bear relevance today.
Mind Control/World Control -1998
Mass Control (engineering human consciousness) - 2003
Mind Control and UFO's: A Casebook on Alternative 3 - 2005