 He later worked as a voice actor in "", where he voiced a Brain that was freed by Kaos in order to help perfect his Doomlanders project.On May 5, 2015, Proops released nonfiction book "The Smartest Book in the World" through publisher Touchstone.The book is based in part on Proops's weekly podcast "The Smartest Man in the World", detailing the author's movie and poetry recommendations, baseball facts, powerful women, and misconstrued history.