House Speaker Nancy Pelosi’s new book, “Know Your Power — A Message to America’s Daughters,’’ comes out at the end of this month, allowing the Speaker to hit the book promotion trail as she prepares for her spotlighted role as permanent chair of the Democratic National Convention in late August.

The publication timing of the slim 192-page book is no coincidence. At the convention, Pelosi’s publisher, Doubleday, will promote the $22 book, which the first female House speaker co-wrote with author Amy Hill Hearth.

But Pelosi’s writing debut will take a back seat to the works of Sen. Barack Obama, whose two autobiographical volumes continue to sell well. His “The Audacity of Hope’’ is No. 38 on Amazon.com’s list of best-sellers, while his first book, “Dreams from My Father,’’ is No. 77.

Pelosi has also recorded an audio version of her book, and a snippet is available at http://www.randomhouse.com/audio/listen/.

In the excerpt, Pelosi tells how her work on behalf of then-California Gov. Jerry Brown’s 1976 presidential campaign helped turn her from a San Francisco housewife and mother of five who dabbled in Democratic Party politics into a serious political figure who became California state party chair in the early 1980s. In 1987, all her hard work paid off when she was elected to the House in a special election from San Francisco, the Baltimore native’s adopted hometown.

The lesson Pelosi said she learned from helping Brown win the ‘76 Maryland primary was, “By recognizing opportunities, assessing risks and taking action, success can be achieved.’’

That’s pretty much the message of her book — that women can overcome the many obstacles that society places in their path on the way to success. “If women can learn from me, in the same way I learned from the women who came before me, it will make the honor of being Speaker of the House even more meaningful,” she says in the book’s preface.

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