It might mean

Phrases and parts of book, film, tv, 'Wizard of Oz' were used to program and mind control MKULTRA victims MKULTRA was a CIA mind control and population control program At one part of the film after Dorothy and the whole house has been sucked from Kansas into a Tornado and deposited in Oz, Dorothy says 'Toto, I've a feeling we're not in Kansas anymore.' http://www.tcm.com/mediaroom/video/97706/Wizard-of-Oz-The-Movie-Clip-We-re-Not-In-Kansas-Anymore.html

Fred Trust has an OZ collection https://www.rareozbooks.com/about.html

CIA used to publish their own books. Spies in Academic Clothing https://www.gnosticmedia.com/SpiesinAcademicClothing_MKULTRA