Drew Barrymore
Skinny Legs and All by Tom Robbins
In January, one edition of Skinny Legs sold 1,000 copies in the U.S. That’s about the same number it sold the week after Barrymore was photographed with the novel in February.

Paris Hilton
The Power of Now by Eckhart Tolle
The week after the photos of Hilton holding this guide first appeared, one edition sold 3,000 copies—a 50 percent increase over the previous week. 

Jennifer Garner
The Elf on the Shelf: A Christmas Tradition by Carol Aebersold and Chanda Bell
Sales spiked 300 percent, to 4,000 copies, in the month after Garner was photographed carrying this children’s book.