A witchcraft invocation within a book within a dream — nested speculation. Journey to the Moon seen through "Demon's" eyes. Somnium manuscript leaked: Kepler’s mother accused of witchcraft. Scientifically valid insights (Lagrange points, eclipses from Moon perspective, Privolva / Subvolva, planet size variation, size of the Moon) Somnium translates Kepler’s Three Laws (Elliptical orbits, Equal areas in equal times, Harmonic Law) into narrative form