I am a great fan of Irwing Wallace. I have read most of his books. The good thing about the author is that he chooses a subject and introduces to the reader with a great story. By favourites are as follows :
a) The Word : It is a story on Bible. The initial 150 pages are difficult to read, wherein he describes in detail on what Bible contains and what it does not contain. The story is about a person who tries to fake a new Bible and whether he succeeds is the crux of the story.
b) The Man : This book deals with a peculiar law in USA, where if a President dies in office, vice-president succeeds, failing which the Speaker succeeds, failing which Protem Speaker (Person who acts as a Speaker in his absence). In the story, the Vice President dies, the President and Speaker together killed in a bomb blast which makes Protem Speaker the President. In the story, Protem Speaker is a Negro (a post given to satisfy minorities) and hence becomes the President. How much it shocks the Americans (read Whites) and how they react to the situation forms the crux of the story.
c) The Almighty : This book gives a close look on the business of newpapers and how they go to any length to create stories for his newspapers and increase the circulation.
d) The Prize : This is a book on Nobel Prize and should be definitely read on the true stories surrounding the Nobel Prizes and how in many cases prizes are awarded for reasons other than merit. One of the most interesting anecdote is the story of how Rabindranath Tagore got his Nobel prize. The only weak link is the central story which is rather weak.
e) The R Document : This tells a story of introduction of emergency provision (similar to that of Indian Constitution) in USA, for bringing authoriterian rule in USA. This book coincidently released in India during emergency and hence got banned.