Release Message:  Zebadiah's modified air car is equipped with the professor's "continua" device which allows travel into various fictional universes, such as the Land of Oz, as well as through time. Written by Robert A. Heinlein.

Description:  The book is a series of diary entries by each of the four main characters: Zebadiah John Carter, programmer Dejah Thoris "Deety" Burroughs Carter, her mathematics professor father Jacob Burroughs, and an off-campus socialite Hilda Corners. The names "Dejah Thoris", "Burroughs", and "Carter" are overt references to John Carter and Dejah Thoris, the protagonists of the Barsoom novels of Edgar Rice Burroughs. The four travel in Zebadiah's modified air car Gay Deceiver, which is equipped with the professor's "continua" device and armed by the Australian Defence Force. The continua device was built by Professor Burroughs while he was formulating his theories on n-dimensional non-euclidean geometry. The geometry of the novel's universe contains six dimensions; the three spatial dimensions known to the real world, and three time dimensions - t, the real world's temporal dimension, (tau), and (teh). The continua device can travel on all six axes. The continua device allows travel into various fictional universes, such as the Land of Oz, as well as through time. An attempt to visit Barsoom takes them to an apparently different version of Mars seemingly under the colonial rule of the British and Russian empires; but near the end of the novel, Heinlein's recurring character Lazarus Long hints that they had traveled to Barsoom, and that its "colonial" status was an illusion imposed on them by the telepathically adept Barsoomians: ... E.R.B.'s universe is no harder to reach than any other and Mars is in its usual orbit. But that does not mean that you will find Jolly Green Giants and gorgeous red princesses dressed only in jewels. Unless invited, you are likely to find a Potemkin Village illusion tailored to your subconscious....