ATLANTA - Former President Jimmy Carter often sent his mother to meet with foreign dignitaries and attend state funerals, but it wasn't until he started researching a new book about her life that he learned just what the woman known as "Miss Lillian" did on those visits.

"Mama had developed a reputation for expressing unorthodox opinions and not being constrained by any outside advice," Carter writes in "A Remarkable Mother," which chronicles Lillian's life from her birth in 1898 to her death from cancer in 1983. "The officials in the State Department were always quite nervous about what she would do or say that might violate protocol and damage relations between our government and that of the country she was visiting."

The book is constructed from diaries, letters and interviews with family and friends.

"It was a lot of fun for me to write," Carter said in a recent telephone interview with The Associated Press. "I learned a lot I hadn't known before."

One such tidbit? His mother, on visiting Rome, brushed aside prepared remarks and told the media she was happy to be there for three reasons, among them that she had "never met an ugly Italian."

Her blunt and unorthodox ways often embarrassed her peanut farmer-turned-politician son, who spent many White House press conferences answering questions about comments his mother had made the previous day.