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In this photo provided by CBS, Comedy Central’s Stephen Colbert, left, shakes hands with host David Letterman on the set of the “Late Show with David Letterman,” Tuesday, April 22, 2014, in New York. The late-night transition from David Letterman to Steven Colbert and from Craig Ferguson to a yet-to-be-named host remains undecided, CBS Entertainment chief Nina Tassler said Thursday, July 17, 2014.Network meetings will be held in August to discuss the scheduling of Colbert's 2015 debut as "Late Show" host, Tassler told a Television Critics Association meeting. (AP Photo/Jeffrey R. Staab) MANDATORY CREDIT, NO SALES, NO ARCHIVE, FOR NORTH AMERICAN USE ONLY Image Credit: AP

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 on 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.