Fiction

1. “The Da Vinci Code,” by Dan Brown (Doubleday, $24.95). A murder at the Louvre leads to a trail of clues found in the work of Leonardo and to the discovery of a secret society.

2. “The Hostage,” by W. E. B. Griffin (Putnam, $26.95). An Army officer probes the murder of an American diplomat and the kidnapping of his wife, whose brother is linked to the Iraq oil-for-food scandal.

3. “The Cat Who Dropped a Bombshell,” by Lilian Jackson Braun (Putnam, $23.95). The columnist Jim Qwilleran and his cats investigate the mysterious death of a wealthy couple.

4. “S is for Silence,” by Sue Grafton (Marian Wood/Putnam, $26.95). Kinsey Millhone searches for a woman who disappeared 34 years ago.

5. “Mary, Mary,” by James Patterson (Little, Brown, $27.95). The FBI agent Alex Cross tracks a Hollywood killer who announces the crimes via e-mail.

Nonfiction

1. “For Laci,” by Sharon Rocha (Crown, $25.95). Laci Peterson’s mother recalls her daughter and describes her killer’s trial.

2. “Marley & Me,” by John Grogan (Morrow, $21.95). A newspaper columnist and his wife learn some life lessons from their neurotic dog.

3. “My Friend Leonard,” by James Frey (Riverhead, $24.95). The author of the addiction memoir “A Million Little Pieces” remembers a helpful mobster friend.

4. “The World is Flat,” by Thomas L. Friedman (Farrar, Straus & Giroux, $27.50). A columnist for The New York Times analyzes 21st-century economics and foreign policy and presents an overview of globalization trends.

5. “The Year of Magical Thinking,” by Joan Didion (Knopf, $23.95). The author’s attempts to come to terms with the death of her husband and the grave illness of their only daughter.

– The New York Times