Jules Verne's Extraordinary Voyages/Amazing Journeys collection - 54 novels, whose purpose was to "to outline all the geographical, geological, physical, historical and astronomical knowledge amassed by modern science and to recount, in an entertaining and picturesque format ... the history of the universe." No magic, sex, or blasphemy -- good clean fun and lots of real science . Here is a
list - most are PD. Most are available in the MobileRead library.
Dated in content, but quite fun reads