The Principles of Philosophy

50 Philosophy Ideas You Really Need to Know

The Socrates Express - In Search of Life Lesson from Dead Philosophers

The Little Book of Philosophy

Philosophy for Dummies

2nd Edition - Learning Made Easy

Philosophy 50 Essential Ideas

Philosophy (Arcturus Fundamentals) - from The Ancient Greeks to Great Thinkers of Modern Times

The Little Book of Philosophy

How Philosophy Works - The Concepts Visually Explained

Philosophy (A Degree in a Book) - Everything You Need to Know to Master The Subject-in One Book!

Simply Philosophy 

The Philosophy Book (DK) - Big Ideas Simply Explained