Halperin (born October 31, 1952, in Boston, Massachusetts) is an American author and businessman.
In 1985 Halperin authored a text on grading coins, How to Grade U.S.
Coins, upon which the grading standards of the two leading third-party grading services PCGS and NGC were ultimately based.
He is also author of two popular futurism fiction books, The Truth Machine (1996) and The First Immortal (1997), both best-sellers that were each cited in PC Magazine's 20th Anniversary Survey in 2001 as one of the 17 top science/technology fiction books of the previous 20 years.
The Truth Machine is currently under development as a motion picture by Morgan Freeman's Revelations Entertainment.