Task: Question Understanding
Input (English): Context : As dated in The Continent Makers and Other Tales of the Viagens and the 1959 version of de Camp's essay ``The Krishna Stories,'' the action of ``The Continent Makers'' takes place in the year 2153 AD., placing it after ``The Colorful Character'', and making it the third Viagens story set on Earth in terms of chronology. 
Question : What series is The Continent Makers from?
Output (English): series