Dianetics
Self-Improvement

Dianetics (by L. Ron Hubbard): A best-seller (over 15,000,000 copies sold). 
Scientology - A New Slant on Life (by L.Ron Hubbard): A "must read". 
Self Analysis (by L.Ron Hubbard): The complete do-it-yourself handbook for anyone who wants to improve their abilities and success potential.
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Positioning
Marketing, Sales & PR
Positioning (by Al Ries and Jack Trout): How to establish a "position" for your product in the prospect's mind. 
Marketing Warfare (by Al Ries and Jack Trout): How to develop the right marketing strategy. 
The 22 Immutable Laws of Marketing (by Ries and Trout): The 22 laws for understanding and succeeding in the international marketplace. 
The 22 Immutable Laws of Branding (by Al Ries and Laura Ries): How to build a product or service into a world-class brand. 
Marketing High Technology : An Insider's View (by William H. Davidow):  Davidow draws on his successful marketing experience at Intel Corporation to create a complete program for marketing victory. This book does a great job of describing the difference between a piece of technology and a product.
Big League Sales Closing Techniques (by Les Dane) The "classic" on sales closing techniques.
The New Strategic Selling : The Unique Sales System Proven Successful by the World's Best Companies: The tools to effectively handle complex sales situations
Effective Public Relations (by Cutlip & Center): The "bible" of the public relations field. A comprehensdive manual of the concepts, origins, principles, and theories of PR.
Helmut Newton
Photography & Art
Helmut Newton - Private Property: A collection of photographs by Helmut Newton.
The Best of Helmut Newton: Over 100 photos spanning Newton's career.
Helmut Newton - Portraits: For a long time out of print, this classic is now available again. 
Jaques-Henri Lartigue - Diary of a Century: The world seen through the eyes of a master. 
Jeanloup Sieff 1950-1990 : Time Will Pass Like Rain
The Pirelli Calendar, 1964-1997 More than 250 color photos from all 24 Pirelli calendars since 1964. Photographs by Joyce Tenneson, Richard Avedon, Herb Ritts and others.
The story of Art (by E.H.Gombrich) The most famous and popular book on art ever published, selling more than 5 million copies since its first edition in 1950. 
Battlefield Earth

Mission Earth

Science Fiction

Battlefield Earth (by L.Ron Hubbard) It's the year 3000 A.D. and Man has become an endangered species under the ruthless rule of an alien race. "This has everything: suspense, pathos, politics, war, humor, diplomacy and intergalactic finance." (Publishers Weekly)

Mission Earth (by L.Ron Hubbard)  The Invaders Plan (Vol 1)  Black Genesis (Vol 2)   The Enemy Within (Vol 3)   An Alien Affair (Vol 4)   Fortune of Fear (Vol 5)   Death Quest (Vol 6)   Voyage of Vengeance (Vol 7)   Disaster (Vol 8)   Villainy Victorious (Vol 9)   Doomed Planet (Vol 10)  An epic told entirely by the aliens that already walk among us. Earth is to be invaded and a royal combat engineer must cross 22 light years to secretly infiltrate the planet. "A big humorous tale of interstellar intrigue." (Roger Zelazny) "An intergalactic 'Raiders of the lost Ark'." (Paul T. Hughes) 

The Lensman Series (by E. E. Doc Smith) Triplanetary (Vol 1) First Lensman (Vol 2)   Galactic Patrol (Vol 3)  Gray Lensman (Vol 4)   Second Stage Lensmen (Vol 5)  One of the greatest space-opera saga ever told. Through a series of scenes spanning millions of years, readers will learn how the titanic struggle between the good Arisians and the evil Eddorians first came to pass and how humanity was chosen to assume the awesome power of the lens.

Fundamentals of Thought
Enlightenment
Scientology: The Fundamentals of Thought (by L.Ron Hubbard): Body? Mind? Spirit? Who are you really?
RealVideo Click here for a video clip.
Jonathan Livingston Seagull (by Richard Bach): A story on how you can live following your dreams.
Twelve Against the Gods (by Bolitho): Biographies of 12 Adventurers (Alexander the Great, Columbus, Casanova, Napoleon, Lola Montez, Isadora Duncan, et al). 
Sophie's World (by Jostein Gaarder): A Novel About the History of Philosophy. 
Fit or Fat
Health
The New Fit or Fat (by Covert Bailey): Bailey reveals the secret of true fitness: keep your muscles in peak form and everything else will follow.
Let's Eat Right to Keep Fit (by Adelle Davis): A practical guide to nutrition designed to help you achieve good health through proper diet.
Eat Right for Your Type (by Peter D'Adamo): The individualized diet solution to staying healthy, living longer & achieving your ideal weight based on the 4 different blood types.
Better Eyesight Without Glasses (by William Bates):  A series of exercises to improve your vision without the aid of eyeglasses.
Clear Body Clear Mind (by L.Ron Hubbard): How to purify the body of the effects of drugs and toxins. 
Story of Mankind
History & Politics
The Story of Mankind (by Hendrik Willem Van Loon): A history book which reads like a novel.
The Eyewitness (by Ernst Weiss): Adolf Hitler's belief he was meant to rule the world may have stemmed from a hypnotic suggestion given during psychiatric treatment. 
Psychiatrists-- the men behind Hitler (by Thomas Roeder): Information about the philosophies which German psychiatrists developed and foisted onto the German people.
None Dare Call It Conspiracy (by Gary J. Allen): This books certainly gives you a different view on politics and history. 
Languages
Learn in Your Car: Spanish (also: FrenchItalianGermanJapanese ): The best language course I found. This audio course provides a gradient approach  to learning a new language without the need of a textbook. Highly recommended!
Read Japanese Today (by Len Walsh): Learn how to read Japanese in a day!
The Oxford Spanish Dictionary (Spanish-English/English-Spanish):  This is the very best Spanish English dictionary: 275,000 words and phrases, 450,000 translations, sample sentences, idioms and regional expressions. 1829 pages.
Webster's New World Compact School and Office Dictionary  Includes more than 58,000 entries with user-friendly definitions and etymologies. My favourite English dictionary.