Money may or may not be the root of all evil, but it may well be the root cause of a goodly number of personality problems. These psychologist-authors have taken the totally psychoanalytic view that greed represents oral frustration. ""The person with an insatiable appetite for money is not unlike the starving person whose sole preoccupation is devouring food. . . it is probably more than coincidence that slang words for money are frequently terms like 'lettuce,' 'bread,' and 'dough.'"" Likewise, the person who is emotionally insecure stacks up money as a bulwark against anticipated attacks on his or her ego. The authors maintain that people focus on money for four basic reasons--security, power, love, and freedom--and they analyze the personality types involved in each sort of money-lust. The compulsive bargain hunter, for example, uses his/ her purchases to bolster the ego by seemingly outsmarting others. That's likely true, and so is much of the rest of this theory. Cash in.