The book runs more than 300 pages, but its chapters are short and written in simple language directed at teenage readers.160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! By Ben Nuckols THE ASSOCIATED PRESS ANNAPOLIS, Md. – Jenna Bush looked poised as she stepped to the podium, but she couldn’t quite hide the butterflies as she stood before an eager bookstore crowd Saturday to introduce her new book, Ana’s Story: A Journey of Hope. “This is my first day, so I’m a little nervous,” the 25-year-old daughter of President Bush admitted. Her face lit up, though, as soon as she started talking about the subject of her nonfiction narrative – a teenage mother with HIV whom she met during an internship with UNICEF in Latin America. “Ana changed my life. She’s only 17 years old, but she’s lived the life of somebody so much older,” Bush said. “Despite her hardships, Ana is so much like the teenagers here in the United States. She reminds me of myself at that age.” Bush embarks this weekend on a two-month national book tour. While her sister, Barbara, maintains a low profile, Jenna has begun to reveal her devotion to education and helping the underprivileged. She said she never had a reason to interact with the media until she had something important to say. “I didn’t have something that I was passionate about,” she said.