Posted by John McCormick at 10:52 a.m. CDT

If you haven't already read enough about the junior senator from Illinois, the latest book about him will be hitting the stores late this summer. Tribune reporter David Mendell followed Barack Obama during his 2004 U.S. Senate bid and has been working on a biography ever since.

Obama: From Promise to Power is due out in mid-August, but Amazon.com is already taking advance orders. A copy of the jacket cover can be seen here.

The nearly 400-page book is tentatively set for release on Aug. 14 by publisher HarperCollins/Amistad.

From the book's jacket cover: "Barack Obama’s meteoric rise from Hawaiian high schooler to exemplary Harvard Law School student to well-groomed politico is the stuff of legend, a political story that has captured the attention of virtually every American.

"Since his headline-grabbing speech at the Democratic National Convention in 2004, Obama has come to represent the promise of unity among groups of all types – black and whites; Democrats, Republicans, and moderates; the young and the old; the upper, middle, and lower classes.

"In this first-of-a-kind, groundbreaking biography, veteran journalist and Obama chronicler David Mendell gives an in-depth, comprehensive portrait of the boy named Barry who took inspiration from his hard-working parents and became the eloquent, suave Obama – a man whose last name has become a catchphrase for hope in a politically jaded society desperate for a new star."