Multiple sources told ICv2 late Monday that Marvel is about to announce that it is moving its book distribution from Client Distribution Services to Diamond Book Distributors.  The move would be a return for Marvel, which left Diamond two years ago for CDS (see 'Marvel Headed to CDS'). 

The move will put two of the largest graphic novel publishers, Dark Horse and Marvel, at Diamond, and one each at CDS (Tokyopop), Simon and Schuster (Viz), and Warners (DC).  Diamond has been aggressively building its book trade distribution operation since it formed its new division a little over three years ago.  It also has a large number of medium and smaller graphic novel publishers as book distribution clients.