The deal includes character fiction, activity books, annuals, personalised books, children's magazines as well as digital products, which will be launched in July 2011.
Egmont managing director David Riley said: "Generator Rex has launched successfully in the UK and we are delighted to be expanding the show's franchise with Egmont's broad and exciting range of publishing products."
Egmont wins Cartoon Network series books
Customer publisher Egmont has won a contract to produce a range of print and digital products to capitalise on the success of Cartoon Network's Generator Rex series.