It's been a summer of blockbuster debuts, including The Story of Edgar Sawtelle and The Lace Reader. Now add another: The Guernsey Literary and Potato Peel Pie Society. The novel, by first-time author Mary Ann Shaffer (who died before the book was published) and her children's-author niece Annie Barrows, revolves around a woman corresponding with residents on the island of Guernsey about their experiences during World War II. It hits No. 5 on PW's list this week.

PUBLISHERS WEEKLY

* Fiction

1. Acheron - Sherrilyn Kenyon. St. Martin's Press

2. The Bourne Sanction - Robert Ludlum, Eric Van Lustbader. Grand Central

3. The Host - Stephenie Meyer. Little, Brown

4. Moscow Rules - Daniel Silva. Putnam

5. The Guernsey Literary and Potato Peel Pie Society - Mary Ann Shaffer and Annie Barrows. The Dial Press

* Nonfiction*

1. The Last Lecture - Randy Pausch and Jeffrey Zaslow. Hyperion

2. The Obama Nation - Jerome R. Corsi. Threshold Editions

3. Stori Telling -Tori Spelling. Simon Spotlight

4. The Way of the World - Ron Suskind. Harper

5. When You Are Engulfed in Flames - David Sedaris. Little, Brown

LOCAL BEST-SELLERS

* Fiction

1. The Story of Edgar Sawtelle - David Wroblewski

2. The Art of Racing in the Rain - Garth Stein

3. People of the Whale - Linda Hogan

4. The Guernsey Literary and Potato Peel Pie Society - Mary Ann Shaffer and Annie Barrows

5. The Lace Reader - Brunonia Barry

* Nonfiction

1. The Last Lecture - Randy Pausch and Jeffrey Zaslow

2. Sex, Science & Stem Cells - Diana DeGette

3. Heaven and Hell - Don Felder and Wendy Holden

4. When You Are Engulfed in Flames - David Sedaris

5. The Obama Nation - Jerome R. Corsi

* We have eliminated self-help and how-to books from the PW list to display a wider array of titles. Local information is from the Tattered Cover, Borders in Park Meadows and the Boulder Book Store.