Ivan's newest series BrainMatics saw its first release in the United States May 2009, it was published by h.f. ullmann and distributed in the US by the Langenscheidt Publishing Group.
It acquired Mapsco in March 2010 and the map division of travel publisher Langenscheidt in August.
In addition he has contributed definitions and other material to dictionaries and other language reference works issued by Oxford University Press, Cambridge University Press, Longman, Macmillan, HarperCollins, Chambers Harrap, Langenscheidt, Berlitz, Scholastic Corporation, and Merriam-Webster, among others.