The Mentor Philosophers Paperback Mid Century Book Set

This fun set of four books in The Mentor Philosophers series include:

17th Century Philosophers, The Age of Reason, 1964, 8th printing

18th Century Philosophers, The Age of Enlightenment, 1956, 12th printing

The Renaissance Philosophers, The Age of Adventure, 1956, 9th printing

19th Century Philosophers, The Age of Ideology, 1956, 12th printing

All books are in good condition. Age of Reason has some pen and pencil marks.