Beginning in 1925, Wernher attended a boarding school at Ettersburg Castle near Weimar, where he did not do well in physics and mathematics. There he acquired a copy of "Die Rakete zu den Planetenräumen" (1923, "By Rocket into Planetary Space") by rocket pioneer Hermann Oberth. In 1928, his parents moved him to the Hermann-Lietz-Internat (also a residential school) on the East Frisian North Sea island of Spiekeroog. Space travel had always fascinated Wernher, and from then on he applied himself to physics and mathematics to pursue his interest in rocket engineering.