From epubbooks.com:

Verne’s most outrageous “voyage extraordinaire” - a hasty world tour taken up on a gentlemen’s club wager! Mr. Phileas Fogg, master of precision, enters into the strangest wager ever made over the whist table - that he will circle the globe in 80 days. The news astounds Jean Passepartout, sometime wandering minstrel, bareback rider, funambulist, gymnast and fireman, now turned valet to Mr. Fogg in the expectancy of a quiet and well-regulated life. For the next 80 days, their lives are anything but quiet or well-regulated.Jules Verne preferred to call himself an author of “voyages extraordinaires.” An extraordinary voyage it is, from Fogg’s announcement to Passepartout that they are to “leave for Dover in ten minutes,” to his triumphant return to the Reform Club at the last second!

From librivox.org:

The story involves a German professor (Otto Lidenbrock in the original French, Professor Von Hardwigg in the most common English translation) who believes there are volcanic tubes going toward the center of the Earth. He, his nephew Axel (Harry), and their guide Hans encounter many adventures, including prehistoric animals and natural hazards, eventually coming to the surface again in southern Italy.

From epubbooks.com:

A mission to rid the seas of a monstrous creature becomes a terrifying nightmare when Professor Arronax, Conseil and Ned Land are thrown overboard. The huge marine animal which has haunted the water is no living beast, but a spectacular man-made vessel, and the three men find themselves the helpless prisoners of Captain Nemo. Resigned to their fate, they begin a miraculous journey on the submarine ship which can travel through waters never before explored. For the Professor, at least, this voyage is one he would not have missed for the world.