Mark's authors have been published with houses such as Scholastic, Houghton Mifflin Harcourt, and Penguin Random House; gotten 6 -
figure book deals; appeared on the NY Times bestseller list; had their work
optioned for TV, stage, and feature
film with companies such as Paramount Pictures and DreamWorks; won countless awards; and had their work licensed in more than 40 countries, resulting in millions of books sold.