The "Colbert Bump" is becoming contagious.

Edan Lepucki, whose novel "California" became a best-seller thanks to a plug from Stephen Colbert, has in turn helped another book catch on.

During an interview on Comedy Central's "The Colbert Report" that aired Monday night, Lepucki recommended Stephan Eirik Clark's "Sweetness #9." By Tuesday morning, the novel was in the top 300 on Barnes & Noble.com and in the top five for Powell's Books, an independent store based in Portland, Oregon, that has been a leading seller of Lepucki's book.

Both "California" and "Sweetness #9" are part of Colbert's campaign to help works published by Hachette Book Group USA, which is in tense contract negotiations with Amazon.com. The online retailer is not accepting pre-orders for "Sweetness," an August release, and other Hachette books.