5 books in series

Made Simple

Made Simple is a 5-book series with 5 released primary works first released in 1956 with contributions by Richard H. Popkin, Avrum Stroll, Arnold Leitner, V. Anton Spraul, and Barbara P. Moss.

German Made Simple
Filosofia per tutti
Filozofia
Computer science made simple
Philosophy Made Simple: A Complete Guide to the World's Most Important Thinkers and Theories