I've just found the book, Bingley, written by John D. Gartner who teaches psychiatry at the Johns Hopkins Medical School.

Here is an extract from something he wrote which is "adapted from his new book The Hypomanic Edge".

"Hypomania—often found in the relatives of manic depressives—is a mild form of the psychiatric disorder known as mania. Hypomanics are brimming with infectious energy, irrational confidence, and really big ideas. They think, talk, move, and make decisions quickly. Anyone who slows them down with questions “just doesn’t get it.” Hypomanics are not mental cases, but “normal” is not the first word that comes to mind when describing them. Hypomanics live on the edge, between normal and abnormal.
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"There will be gold rushes, booms, and manias aplenty in our future. America has been a ship riding the waves of irrational exuberance for hundreds of years, and she’s not likely to change course any time soon.

It’s in our blood."

America’s Manic Entrepreneurs
By John Gartner

http://snipurl.com/g877