Allan and the Ice Gods

Originally published in 1927, "Allan and the Ice Gods" is the final volume of the Allan Quatermain saga that started with the famous novel "King Solomon's Mines". It is the last of 14 books that Henry Rider Haggard wrote depicting the adventures of the great English hunter in the wilds of mysterious Africa. 

Once more Quatermain takes the hallucinogenic taduki drug, as he did in previous novels. Then he is mysteriously transported back to the Paleolithic era whereby he inhabits the body of a warrior in this classic journey back in time. Haggard masterfully captures the prehistoric environment in this science fiction thriller.