The Road Less Traveled
published in 1978, is Peck's best-known work, and the one that made his reputation. It is, in short, a description of the attributes that make for a fulfilled human being, based largely on his experiences as a psychiatrist and a person.
In the first section of the work Peck talks about discipline, which he considers essential for emotional, spiritual and psychological health, and which he describes as "the means of spiritual evolution". The elements of discipline that make for such health include the ability to delay gratification, accepting responsibility for oneself and one's actions, a dedication to truth and balancing.
In the second section, Peck considers the nature of love, which he considers the driving force behind spiritual growth. The section mainly attacks a number of misconceptions about love: that romantic love exists (he considers it a very destructive myth), that it is about dependency, that true love is not "falling in love".', it is a feeling. Instead "true" love is about the extending of one's ego boundaries to include another, and about the spiritual nurturing of another.
People of the Lie
First published in 1983, People of the Lie: The Hope For Healing Human Evil<3> (ISBN 0 7126 1857 0) followed on from Peck's first book. Peck describes the stories of several people who came to him whom he found particularly resistant to any form of help. He came to think of them as evil and goes on to describe the characteristics of evil in psychological terms, proposing that it could become a psychiatric diagnosis.
more at link:
http://en.wikipedia.org/wiki/M._Scott_Peck