Sen. Arlen Specter knows a thing or two about bad health. Spry and physically fit at age 78, he also has a few secrets about living.

In a new book, Specter, already looking ahead to his next re-election fight in 2010, chronicles the painful chemotherapy treatments that left him bald in 2005 as he played a very public role chairing the committee that confirmed Supreme Court Chief Justice John Roberts.

Specter, a five-term Republican who is Pennsylvania's longest-serving senator, credits getting up every day for work with getting him through the treatments for Hodgkin's disease, a cancer of the lymph system. He said he was motivated to write his book, "Never Give In: Battling Cancer in the Senate," because he wanted to be instructive and inspiring to others.

"I think we ought to let it all hang out because when somebody is stricken with cancer or heart disease or Parkinson's or Alzheimer's, they ought to know they are not alone," said Specter in an interview from his Capitol Hill office.