The usual suspects regain the top spots on this week’s poli-sci list, most likley because the others, after initially strong debuts (both on this list and the general nonfiction list), may have already reached their peak.

That’s not true for the spy duo of Robert & Dayna Baer, who share their decidedly unusual romance upon first meeting in Sarajevo while on separate assignments for the CIA (he was the vet­eran, she a new field agent). An often absorbing account of their covert life together in the agency, and what came after.

And then there is CBS News senior political correspondent Jeff Greenfield’s new book, a “what if?” look at turning points in American history. Our review is still to come, but here’s a link to his appearance on CBS Sunday Morning just last weekend discussing the book — CBS

Former President George W. Bush addresses the audience during the groundbreaking ceremony for the George W. Bush Presidential Center on the campus of SMU in Dallas on Tuesday Nov. 16, 2010. (AP Photo/The Dallas Morning News, Vernon Bryant) (Vernon Bryant/AP)

By George W. Bush

2. Known and Unknown: A Memoir

(Sentinel, $36). By Donald Rumsfeld

3. The Company We Keep: A Husband-and-Wife True-Life Spy Story

(Crown, $26). By Robert Baer & Dayna Baer

4. Wild Bill Donovan: The Spymaster Who Created the OSS and Modern American Espionage

(Free Press, $30). By Douglas Waller

5. The Wrong War: Grit, Strategy, and the Way Out of Afghanistan

(Random House, $28). By Bing West

6. Then Everything Changed: Stunning Alternate Histories of American Politics: JFK, RFK, Carter, Ford, Reagan

(Putnam, $26.95). By Jeff Greenfield

(Journalist Jeff Greenfield, CBS News)

7. Revolt!: How to Defeat Obama and Repeal His Socialist Programs

(Broadside, $26.99). By Dick Morris & Eileen McGann

8. A Simple Government: Twelve Things We Really Need from Washington (and a Trillion That We Don't!)

(Sentinel, $26.95). By Mike Huckabee

9. The Next Decade: Where We've Been . . . and Where We're Going

(Doubleday, $27.95). By George Friedman

Drawn from Book World’s bestseller data supplied by Nielsen BookScan for the week ending March 13, 2011 (culled from the top 50 titles sold). The chart may not be reproduced without permission from Nielsen BookScan. Copyright © 2011 by Nielsen BookScan.