other	Arts & Photography
Biographies & Memoirs	Business & Money
Calendars	Christian Books & Bibles
Comics & Graphic Novels	Computers & Technology
Cookbooks, Food & Wine	Crafts, Hobbies & Home
Education & Teaching	Engineering & Transportation
Health, Fitness & Dieting	Humor & Entertainment
Law	Lesbian, Gay, Bisexual & Transgender Books
Literature & Fiction	Medical Books
Mystery, Thriller & Suspense	Parenting & Relationships
Politics & Social Sciences	Reference
Religion & Spirituality	Romance
Science & Math	Science Fiction & Fantasy
Self-Help	Sports & Outdoors
Teen & Young Adult	Test Preparation
Travel	Children's Books
History

Hidden History by Jim Willis(884)
Lost Civilizations: The Secret Histories and Suppressed Technologies of the Ancients by Jim Willis(882)
Need to Know by Timothy Good(874)
Close Encounters of the Fatal Kind by Nick Redfern(872)
Lost Civilizations by Jim Willis(741)
Alien Intrusion by Bates Gary(709)
Evidence of the Gods by Daniken Erich von(682)
The Real Men in Black by Nick Redfern(667)
Roswell by Thomas J. Carey(593)
Behold a Pale Horse by Milton William Cooper(590)
After the Martian Apocalypse by Mac Tonnies(589)
The Ufo Silencers: Mystery of the Men in Black by Timothy Green Beckley(568)
The Contact Paradox by Keith Cooper(538)
Hidden Truth, Forbidden Knowledge by Steven Greer(535)
The day after Roswell by Philip J. Corso & William J. Birnes(525)
The gods never left us by Erich von Däniken(524)
A Wanderer's Handbook by Carla Rueckert(515)
The Cryptoterrestrials by Mac Tonnies(507)
UFOs by John B. Alexander Ph.D(506)
Confessions of an Alien Hunter by Seth Shostak(502)