Five Weeks in a Balloon & A Journey into the Interior of the Earth. Illustrated

Five Weeks in a Balloon, or, Journeys and Discoveries in Africa by Three Englishmen  is an adventure novel by Jules Verne. It is the first novel in which he perfected the "ingredients" of his later work, skillfully mixing a plot full of adventure and twists that hold the reader's interest with passages of technical, geographic, and historic description. Journey to the Center of the Earth is a  science fiction novel by Jules Verne. The story involves German professor Otto Lidenbrock who believes there are volcanic tubes going toward the centre of the Earth. He, his nephew Axel, and their guide Hans descend into the Icelandic volcano Snæfellsjökull, encountering many adventures, including prehistoric animals and natural hazards, before eventually coming to the surface again in southern Italy, at the Stromboli volcano. Illustrated by Boris Kosulnikov.